New words：

endanger [in'deindʒə] v. 危害；使遭危险；危及
endangered [in'deindʒəd] adj. 濒临灭绝的

Sample Sentences：

You will endanger your health if you smoke.
We should do our best to save endangered species.
The drift of the icebergs in the sea endangers the ships.
That one mistake seriously endangered the future of the company.

iceberg ['aisbə:g] n. 冰山

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