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重点讲解：
1. a bunch of 一伙，一群（人）；
例句：A bunch of children were at play.
一群孩子在玩。
2. save up 储蓄；积攒；攒钱；
例句：People often put money aside in order to save up enough to make one major expenditure.
人们常常为了一笔大的开销而存钱。
3. end up 最终；结果；到头来；
例句：Wasteful people usually end up in debt.
挥霍浪费者最后往往负债。
4. be used to sth./going sth. 习惯于；
例句：She is not used to the new environment.
她对新环境不习惯。
n. 汗，汗水
v. (使)出汗
