1.cast a dark shadow over 给……蒙上阴影
The financial woes the United States has been long failed to solve have cast a dark shadow over the Asian manufacturers and exporters.
美国迟迟无法解决的财务问题已对亚洲制造业者和出口商投下阴霾
2.perpetrator 犯罪者,作恶者
The perpetrator of the crime does not have to be traced before you can claim compensation.
不一定非要抓住罪犯之后你才能够索赔
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