重点讲解:
1. crank up 使增加;使增强;
The legal authorities cranked up the investigation.
执法部门加大了调查力度 。
2. taper off 逐渐减少;逐渐缩小;
Immigration is expected to ta per off.
估计移民会越来越少 。
3. grind to a halt (使)(生长、发展、活动等)完全停止;
The production lines ground to a halt for hours while technicians tried to debug software.
生产线停工达数小时之久,在此期间技术人员试图纠除软件错误 。
4. bounce back 恢复;复原;
He is young enough to bounce back from this disappointment.
他还年轻,会很快从失望沮丧中恢复过来的 。
n. 环境,外界