rack one's brains to try very hard to think of something 絞盡腦汁,苦思冥想
I've been racking my brains all day trying to remember his name.
我一整天都絞盡腦汁,想要回憶起他的名字.
sidetrack:to make somebody start to talk about or do something that is different from the main thing that they are supposed to be talking about or doing 使轉(zhuǎn)變?cè)掝};使轉(zhuǎn)移目標(biāo)
I was supposed to be writing a letter but I'm afraid I got sidetracked. 我本來(lái)應(yīng)該在寫(xiě)信,但后來(lái)恐怕是分心干別的去了.