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1.unhappiness n.苦恼
She was trapped in a downward spiral of personal unhappiness.
她陷入了个人不幸的旋涡难以自拔。
2.effort n.努力
You should put more effort into your work.
你应该更加努力地工作。
3.repeatedly adj.反复地
The drug's effect does not tail off after it has been used repeatedly.
反复使用本药，药效也不会减弱。
4.security n.安全
You may not enter the security area without authorization.
未经批准不得进入警戒地区。
5.Biden called for a cease-fire, an effort to increase humanitarian aid to Yemen and a return to peace talks.
peace talk 和平谈判
Matters have come to a head in the peace talk.
和平谈判已到紧要关头。
The peace talk broke down without any agreement being reached.
和平谈判破局了，没有达成任何协议。
6.Biden called for a cease-fire, an effort to increase humanitarian aid to Yemen and a return to peace talks.
call for 呼吁
Your plan will call for a lot of money.
你的计划需要许多钱。
He didn't even have the intelligence to call for an ambulance.
他连呼叫救护车的头脑都没有。
