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重点讲解：
1. find out (尤指特意通过努力)发现，找出，查明；
An investigation is underway to find out how the disaster happened.
调查已经展开，以查明灾难是如何发生的。
2. go out 外出；
It will be a marvellous occasion and they should go out and enjoy it.
这是个好时机，他们应该出去痛快地玩一玩。
3. business as usual 一切如常；处之泰然；
The Queen was determined to show it was business as usual.
女王决定表现出一切正常的样子。
4. depend on 依靠；依赖；
Many farmers have to depend on subsidies to make a living wage.
许多农民的基本生活工资要靠补贴来维持。
n. (水、气、电)流，趋势
adj. 流通的
