1.rack one's brains 絞盡腦汁，苦苦動腦筋

例句：The gap in wealth comparison Privation has arrived at a pole , has been that every day, you being every pair of meal but rack one's brains.

貧富差距的比較貧窮到了極點，就是每一天你在為每一對飯而絞盡腦汁；

2.rain check (棒球等露天賽事）因下雨改期。再賽時作為入場券的原票票根,(邀請方在受邀方一時不能應邀時的)下次再邀的表示,邀請繼續有效的保證，受邀方一時不能應邀時的）請對方下次再邀的要求，(商店在廉價商品售罄時對顧客的)下次優先供貨保證。

例句：I'm not available now. Can I have a rain check?

我現在沒空，可以改天嗎？

3.rain down 雨點般降下，傾瀉

例句：All kinds of gifts were rained down upon the children.

各式各樣的禮品紛紛送到孩子們手里。

4.rain or shine 不論晴雨，無論情況如何

例句：Rain or shine, the match will go on time.

不管晴天還是下雨，比賽準時進行。

5.rain out 使(雨）下完(停止)；[常用被動語態]因雨阻止，因雨中斷（延期、取消）

例句：The athletic meeting was rained out.

運動會因雨延期舉行。

6.rake over the ashes 回憶（不偷快的）往事；舊事重提

例句：I don't want to get into a discussion with Arnold because he'll want to rake over the ashes of my past mistakes.

我不想和阿諾德討論，因為他想使我回想起我過去犯錯誤不愉快的往事。