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重点讲解：
1. rest up 充分休息；休养；
He is tired, and let him rest up from his work.
他累了，让他好好歇歇乏吧。
2. day off 休假日；休息日；
Yesterday was a day off for everybody, with the exception of Lawrence.
昨天所有人都放一天假，劳伦斯除外。
3. specialize in 专攻；专门研究；
Many students specialize in engineering.
许多学生专攻工程学。
4. meet up 偶遇；见面；
I am back in my office and meet up with all of our staff.
我回到了办公室和我所有的员工见了面。
