New words：

species ['spi:ʃi:z] n. 种；物种；种类

Sample Sentences：

There are several species of zebra.
This species of bird now exists only in Africa.
This rare bird has become an endangered species.

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

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