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重点讲解：
1. do one's utmost to do sth. 极度；极限；最大可能；
Now that you put your hand to the work, you should do your utmost to finish it.
既然你已经着手这项工作了，那就应该尽力完成它。
2. foot the bill 付账；买单；
You order the dishes and I'll foot the bill.
你点菜，我来付账。
3. rely on 依赖；依靠；
We don't rely on blessings from Heaven.
我们不靠老天保佑。
4. no longer 不再；已不；
They no longer had him as a friend.
他们再也不把他看成朋友了。
n. 预备品，贮存，候补
n. 克制，含蓄
