重点讲解：
1. take a back seat 让权于他人；退居次要位置；
例句：You need to take a back seat and think about both past and future.
你得退居二线，把过去和将来都捋清楚。
2. carry on 继续；接着；坚持；
例句：Rachael Carr intends to carry on teaching.
雷切尔·卡尔打算继续教书。
3. in charge 主管；全面负责；统领；
例句：I gather that he is the one in charge.
我猜想他是负责的人。
4. watch out for 密切注意；戒备；提防；
例句：I advised them to watch out for slick spots on the sidewalk.
我叫他们当心人行道上路滑的地方。
