1. The oil spill endangered thousands of birds.
    石油的溢泄危及成千上万的鸟儿。

2. The polluted air in the city is badly endangering the health of the residents.
    城里被污染的空气正严重地危及居民的健康。

1. 危害：eliminate 消除 | endanger 危害 | enlighten 启发

2. 危及：forty 四十 | endanger 危及 | examine 检查

3. 使受危险：enable 使能够 | endanger 使受危险 | enlighten 启发,启蒙

4.

4. 使处于危险的：enlist招兵 | endanger使处于危险的 | enable使能够

1. 使遭遇危险；危及;危害
    To endanger something or someone means to put them in a situation where they might be harmed or destroyed completely.

    e.g. The debate could endanger the proposed peace talks.
           这一争论可能会危及提议进行的和平谈判。
    e.g. ...endangered species such as lynx and wolf.
           猞猁、狼等濒危物种

1. put in a dangerous, disadvantageous, or difficult position

    Synonym: queerexposescupperperil

2. pose a threat to
    present a danger to

    e.g. The pollution is endangering the crops

    Synonym: jeopardizejeopardisemenacethreatenimperilperil