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1.carry out 执行
例句：Three students were chosen to carry out the experiment.
挑选了三名学生进行这项实验。
2.evasive action 躲避动作
例句：When a device fails, operations first needs to take evasive action.
设备一旦出现故障，操作首先需要执行规避措施。
3.head-on crash 迎头相撞
例句：Reports say the accident was a head-on crash which happened in the early hours of the morning.
记者报道两辆车于今天上午早些时候在高速路上头对头发生的相撞。
4.single lane 单行道
例句：As an interim measure a single lane would be paved, adhering to one side of the road for a few milesand then switching to the other side.
作为一个过渡的办法，车道都是单线的，司机靠着路的一侧开上几英里，再切换到路的另一侧。
