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1.contribute to 促成
例句：Various factors contributed to his downfall.
多种因素的作用导致了他的倒台。
2.pose a threat 构成威胁
例句：This could pose a threat to jobs in the coal industry
这可能会给煤炭产业的就业造成威胁。
3.begin to 开始
例句：The horns of some deer begin to shed.
有些鹿开始换角了
4.active faults 活断层
例句：Active faults and lineaments, and recent volcanic activity were re-examined.
对活断层，线状区和近期火山活动进行了重新研究。
