diff --git a/src/app/api/custom_generate/route.ts b/src/app/api/custom_generate/route.ts
index 61d17a0..dcd2104 100644
--- a/src/app/api/custom_generate/route.ts
+++ b/src/app/api/custom_generate/route.ts
@@ -6,23 +6,17 @@ export async function POST(req: NextRequest) {
     try {
       const body = await req.json();
       const { prompt, tags, title, make_instrumental, wait_audio } = body;
-
-      // 校验输入参数
       if (!prompt || !tags || !title) {
         return new NextResponse(JSON.stringify({ error: 'Prompt, tags, and title are required' }), {
           status: 400,
           headers: { 'Content-Type': 'application/json' }
         });
       }
-
-      // 调用 SunoApi.custom_generate 方法生成定制音频
       const audioInfo = await (await sunoApi).custom_generate(
         prompt, tags, title,
         make_instrumental == true,
         wait_audio == true
       );
-
-      // 使用 NextResponse 构建成功响应
       return new NextResponse(JSON.stringify(audioInfo), {
         status: 200,
         headers: { 'Content-Type': 'application/json' }
@@ -35,7 +29,6 @@ export async function POST(req: NextRequest) {
           headers: { 'Content-Type': 'application/json' }
         });
       }
-      // 使用 NextResponse 构建错误响应
       return new NextResponse(JSON.stringify({ error: 'Internal server error' }), {
         status: 500,
         headers: { 'Content-Type': 'application/json' }
diff --git a/src/app/api/generate/route.ts b/src/app/api/generate/route.ts
index af95b78..ea8d06a 100644
--- a/src/app/api/generate/route.ts
+++ b/src/app/api/generate/route.ts
@@ -7,7 +7,6 @@ export async function POST(req: NextRequest) {
       const body = await req.json();
       const { prompt, make_instrumental, wait_audio } = body;
 
-      // 校验输入参数
       if (!prompt) {
         return new NextResponse(JSON.stringify({ error: 'Prompt is required' }), {
           status: 400,
@@ -15,10 +14,8 @@ export async function POST(req: NextRequest) {
         });
       }
 
-      // 调用 SunoApi.generate 方法生成音频
       const audioInfo = await (await sunoApi).generate(prompt, make_instrumental == true, wait_audio == true);
 
-      // 使用 NextResponse 构建成功响应
       return new NextResponse(JSON.stringify(audioInfo), {
         status: 200,
         headers: { 'Content-Type': 'application/json' }
@@ -31,7 +28,6 @@ export async function POST(req: NextRequest) {
           headers: { 'Content-Type': 'application/json' }
         });
       }
-      // 使用 NextResponse 构建错误响应
       return new NextResponse(JSON.stringify({ error: 'Internal server error: ' + JSON.stringify(error.response.data.detail) }), {
         status: 500,
         headers: { 'Content-Type': 'application/json' }
diff --git a/src/app/api/get/route.ts b/src/app/api/get/route.ts
index 9de1b56..991e0be 100644
--- a/src/app/api/get/route.ts
+++ b/src/app/api/get/route.ts
@@ -5,26 +5,23 @@ export const dynamic = "force-dynamic";
 export async function GET(req: NextRequest) {
   if (req.method === 'GET') {
     try {
-      // 修复了获取查询参数的方式
       const url = new URL(req.url);
       const songIds = url.searchParams.get('ids');
       let audioInfo = [];
       if (songIds && songIds.length > 0) {
         const idsArray = songIds.split(',');
-        // 调用 SunoApi.get 方法获取音频信息
         audioInfo = await (await sunoApi).get(idsArray);
       } else {
         audioInfo = await (await sunoApi).get();
       }
 
-      // 使用 NextResponse 构建成功响应
       return new NextResponse(JSON.stringify(audioInfo), {
         status: 200,
         headers: { 'Content-Type': 'application/json' }
       });
     } catch (error) {
       console.error('Error fetching audio:', error);
-      // 使用 NextResponse 构建错误响应
+
       return new NextResponse(JSON.stringify({ error: 'Internal server error' }), {
         status: 500,
         headers: { 'Content-Type': 'application/json' }
diff --git a/src/app/api/get_limit/route.ts b/src/app/api/get_limit/route.ts
index d498cb3..8094694 100644
--- a/src/app/api/get_limit/route.ts
+++ b/src/app/api/get_limit/route.ts
@@ -4,17 +4,17 @@ export const dynamic = "force-dynamic";
 export async function GET(req: NextRequest) {
   if (req.method === 'GET') {
     try {
-      // 调用 SunoApi.get_limit 方法获取剩余的信用额度
+
       const limit = await (await sunoApi).get_credits();
 
-      // 使用 NextResponse 构建成功响应
+
       return new NextResponse(JSON.stringify(limit), {
         status: 200,
         headers: { 'Content-Type': 'application/json' }
       });
     } catch (error) {
       console.error('Error fetching limit:', error);
-      // 使用 NextResponse 构建错误响应
+
       return new NextResponse(JSON.stringify({ error: 'Internal server error' }), {
         status: 500,
         headers: { 'Content-Type': 'application/json' }
diff --git a/src/lib/SunoApi.ts b/src/lib/SunoApi.ts
index adc24fc..0934336 100644
--- a/src/lib/SunoApi.ts
+++ b/src/lib/SunoApi.ts
@@ -9,20 +9,20 @@ const logger = pino();
 
 
 export interface AudioInfo {
-  id: string;
-  title?: string;
-  image_url?: string;
-  lyric?: string;
-  audio_url?: string;
-  video_url?: string;
-  created_at: string;
-  model_name: string;
-  gpt_description_prompt?: string;
-  prompt?: string;
-  status: string;
-  type?: string;
-  tags?: string;
-  duration?: string;
+  id: string; // Unique identifier for the audio
+  title?: string; // Title of the audio
+  image_url?: string; // URL of the image associated with the audio
+  lyric?: string; // Lyrics of the audio
+  audio_url?: string; // URL of the audio file
+  video_url?: string; // URL of the video associated with the audio
+  created_at: string; // Date and time when the audio was created
+  model_name: string; // Name of the model used for audio generation
+  gpt_description_prompt?: string; // Prompt for GPT description
+  prompt?: string; // Prompt for audio generation
+  status: string; // Status
+  type?: string; 
+  tags?: string; // Genre of music.
+  duration?: string; // Duration of the audio
 }
 
 class SunoApi {
@@ -45,7 +45,7 @@ class SunoApi {
       }
     }))
     this.client.interceptors.request.use((config) => {
-      if (this.currentToken) { // 使用当前token的状态
+      if (this.currentToken) { // Use the current token status
         config.headers['Authorization'] = `Bearer ${this.currentToken}`;
       }
       return config;
@@ -58,27 +58,33 @@ class SunoApi {
     return this;
   }
 
-
+  /**
+   * Get the session ID and save it for later use.
+   */
   private async getAuthToken() {
-    // 获取会话ID的URL
+    // URL to get session ID
     const getSessionUrl = `${SunoApi.CLERK_BASE_URL}/v1/client?_clerk_js_version=4.70.5`;
-    // 获取会话ID
+    // Get session ID
     const sessionResponse = await this.client.get(getSessionUrl);
     const sid = sessionResponse.data.response['last_active_session_id'];
     if (!sid) {
       throw new Error("Failed to get session id");
     }
-    // 保存会话ID以备后用
+    // Save session ID for later use
     this.sid = sid;
   }
 
+  /**
+   * Keep the session alive.
+   * @param isWait Indicates if the method should wait for the session to be fully renewed before returning.
+   */
   public async keepAlive(isWait?: boolean): Promise<void> {
     if (!this.sid) {
       throw new Error("Session ID is not set. Cannot renew token.");
     }
-    // 续订会话令牌的URL
+    // URL to renew session token
     const renewUrl = `${SunoApi.CLERK_BASE_URL}/v1/client/sessions/${this.sid}/tokens/api?_clerk_js_version=4.70.0`;
-    // 续订会话令牌
+    // Renew session token
     const renewResponse = await this.client.post(renewUrl);
     logger.info("KeepAlive...\n");
     if (isWait) {
@@ -86,10 +92,17 @@ class SunoApi {
     }
     const newToken = renewResponse.data['jwt'];
     console.log("newToken:===\n\n", newToken);
-    // 更新请求头中的Authorization字段，使用新的JWT令牌
+    // Update Authorization field in request header with the new JWT token
     this.currentToken = newToken;
   }
 
+  /**
+   * Generate a song based on the prompt.
+   * @param prompt The text prompt to generate audio from.
+   * @param make_instrumental Indicates if the generated audio should be instrumental.
+   * @param wait_audio Indicates if the method should wait for the audio file to be fully generated before returning.
+   * @returns 
+   */
   public async generate(
     prompt: string,
     make_instrumental: boolean = false,
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index 942b948..ddabf9d 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -3,9 +3,9 @@ import pino from "pino";
 const logger = pino();
 
 /**
- * 暂停指定的秒数。
- * @param x 最小秒数。
- * @param y 最大秒数（可选）。
+ * Pause for a specified number of seconds.
+ * @param x Minimum number of seconds.
+ * @param y Maximum number of seconds (optional).
  */
 export const sleep = (x: number, y?: number): Promise<void> => {
   let timeout = x * 1000;