最初的研究是关于一种濒危动物的起源的。
The original research was about the origin of a kind of endangered animal.
老虎是一种濒危动物。
中国称约有47种濒危动物在世界保护联盟名单上榜上有名。
China claims some 47 critically endangered animal species on the red List of threatened species, kept by the World Conservation Union, a voluntary organization of concerned scientists.
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