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重点讲解：
1. pick up 拿起；
How dare you pick up the phone and listen in on my conversations!
你竟敢拿起电话偷听我的谈话！
2. kill off 被全部杀死；被灭绝；
It is an effective treatment for the bacteria and does kill it off.
这是杀菌的特效药，能将其全部消灭。
3. give up 放弃；戒除；
He suffered a serious injury that obliged him to give up work.
他受伤严重，不得已只好放弃工作。
4. be determined to do sth. 下定决心的；决意的；坚定的；
We are determined to get at the truth.
我们决心查出真相。
