where the shoe pinches

• n. 关键所在；困难所在

例句

用作名词 (n.)

1. This was the key to success of our initial talks.
   这就是我们当初会谈取得成功的关键所在。
2. And that's the crux of forgiveness.
   可这却是原谅他人的关键所在。
3. You must get the difficulty home to John.
   你必须使约翰了解困难所在。