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1.in the wake of 作为…的结果
例句：Social problems cropped up in the wake of natural disasters.
自然灾害之后,出现了许多社会问题.
2.driving force 驱动力
例句：This can become a driving force for social advance.
这能成为促使社会前进的动力。
3.back off 放弃
例句：Now the time for action has arrived,it is too late to back off.
行动的时刻已到，打退堂鼓已经来不及了。
4.make sure 确保
例句：And you have to make sure, what I always say.
所以我经常说，你要确保良好的工作环境。
