
7. tighten your belt: 勒緊腰帶(省吃儉用)
If you have less money than usual, you may have to tighten your belt. 如果你手頭很緊,那你就要勒緊褲腰帶節(jié)衣縮食啦.
8. get to the bottom of something: 找到起因;挖出禍根
The police is eager to get to the bottom of this mystery. 警方急切地想弄清這一神秘事件的真相.