1. exposure to 暴露在……之下
The developing organs of a fetus or child are the most likely to be sensitive to any possible effects of exposure to electromagnetic fields.
胎儿或者小孩，正处于发育状态的器官对暴露的电磁场最为敏感0Qy_T|.UoQ%b=!b0qW|s。

2. a major cause of 一个主要原因
The illegal narcotics trade is said to be a major cause of instability in Afghanistan and is believed to be funding Taliban insurgency.
非法毒品贸易被认为是造成阿富汗局势动荡的一个主要原因，也被认为是塔利班武装的资金来源Ww=Wg)pEl-。

3. much more likely to 可能性大得多
Employees are much more likely to work to achieve goals when they are easy to understand.
当目标通俗易懂的时候，员工去为实现它们而努力的可能性就要大得多T9@Sc5Rrb&#b&VLbD。

4. block out 屏蔽
Over the years she had tried to block out that part of her life.
多年来，她一直在努力把她生命中的那一段经历从记忆中抹去7[i^_A#iU_H。