1、an honest mistake 无心之过
2、you have to do that trade off. 必须做一些权衡
3、water under the bridge 覆水难收
4.1、vent anger on sb 发泄怒火，拿某人撒气
4.2、vent one's frustration by doing sth 发泄怨气
5、return the book to the library 还书
6、sth interrupts my train of thought 打断了我的思路
7、falsify sth 篡改数字、记录等
8、relay the message to sb 转告，传达
9、sb comes forward 站出来，自告奋勇，涌现
10、waver between sth and sth 摇摆，举棋不定
