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重点讲解：
1. no wonder 难怪；怪不得；不足为怪；
No wonder my brother wasn't feeling well.
难怪我兄弟感觉不舒服了。
2. come in (在某件事中)起作用，发挥作用；
Rose asked again, 'But where do we come in, Henry?'
罗丝又问：“但是需要我们干什么，亨利？”
3. pick up 发现，找到，识别；
In these periods of darkness, undetectable to the human eye, sensors are able to pick up light coming from outside the device.
人眼无法觉察这些黑暗的间隙，但是光学传感器却可以捕捉从外界透射进来的光线。
4. participate in 参与；参加；
They expected him to participate in the ceremony.
他们希望他参加典礼。
v. 通知，告诉，向 ... 报告，告发
