W-4：weigh on one's mind 压在心头

　　A:There must be something weighing on your mind. What is it?

　　A:你心里一定有事，怎么了?

　　B:Dad, I lost mum's necklace. I'm afraid she'll scold me.

　　B：爸爸，我把妈妈的项链弄丢了，我怕妈妈会责备我。

　　A:Don't worry. I'll buy a new necklace as same as the old one.

　　A:别担心，我会买一条和旧的一模一样的新项链。

　　B:It's so kind of you, Dad.

　　B：你真太好了，爸爸。