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重点讲解：
1. take effect 生效；起作用
The traffic laws don't take effect until the end of the year.
交通法要到年底才生效。
2. depend on 取决于；依赖
Many adults still depend on their children to work the video.
许多成年人仍依靠他们的孩子来操作录像机。
3. foreign travel 国外旅行
That trip gave me a taste for foreign travel.
那次旅游使我产生了去国外旅行的兴趣。
4. in order to 为了...
She may have farmed the child out in order to remarry.
她为了再婚可能已经把孩子寄养出去了。
