此方法有一個常見用途，說明如下。說明下方的按鈕會將範例值填入 API Explorer，或是開啟全螢幕 APIs Explorer，顯示使用這些值的程式碼範例。如果您變更這些值，程式碼範例也會動態更新。

This example adds a reply to an existing comment. The snippet.parentId property identifies the top-level comment that you are replying to. That property's value specifies a comment thread ID. To add a top-level comment instead of a reply, use the commentThreads.insert method.