1. Chip in 凑钱
We all chipped in to buy Jennifer a going-away present.
大家凑钱买一个送别礼给詹妮弗。
释义：
源于赌博业。
chip: 筹码
chip in: 人们往赌桌上扔筹码
2. Clean up one's act 洗心革面，重新做人
You'd better clean up your act if you want to go to a good school.
如果你想进好学校洗心革面，奋发图强。
