重点讲解：
1. stay away from 远离；
Children must be warned to stay away from main roads.
必须警告孩子们远离交通要道eFNox_u8wBVJMI2。
2. return to 返回，回到；
The doctor may allow her to return to work next week.
医生也许会允许她下周回去上班VMVfKa]NOd。
3. warn of 提醒；警告；
Police have warned of possible delays.
警方已经通知可能会廷期x6g-jVIH0A]h&s+w=C。
4. in place （法律、政策、行政体系等）正在运作，就位；
The United States plans to tighten the economic sanctions currently in place.
美国计划加大现有经济制裁的力度;d1TsK#kexx=^C。