1.hangs over 使...忧虑
A constant threat of unemployment
hangs over thousands of university researchers.
持续的失业威胁使数千名大学研究人员感到忧虑。
2.pros and cons 赞成者和反对者
As a developer, you must weigh the
pros and cons of having multiple languages in your application.
作为开发人员，必须权衡在同一应用程序中使用多种语言的优点和缺点。
3.cover up 隐藏，掩盖
He suspects there's a conspiracy to
cover up the crime.
他怀疑有掩盖这桩罪行的阴谋。
4.weigh up 评价
Dutch experts believe this is because their subconscious minds were given the time to
weigh up all the pros and cons.
德国专家认为这是因为他们潜意识有了时间权衡所有的利弊。
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