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重点讲解：
1. be away from 远离；离开；
I can't be away from you for that long.
我不能离开你那么久。
2. be concerned about 担心；对......关心；
It's a teacher's duty to be concerned about the students'study.
关心学生的学习是教师分内的事。
3. in part 部分地；一部分；
In part that's because industry is smack in the middle of the city.
这符合他的最大利益，同时也符合你的利益。
4. be dependent on 依赖；依靠；
You'll be dependent on network speed and availability.
您将依赖于网络速度和可用性。
