It is essential that endangered species of animals be protected against being killed.

保护濒危的动物物种免遭残杀是必需的。

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While studying endangered species may provide some insights to scientists, the cost of keeping these animals in existence can not be justified for research purposes alone.

虽然研究濒危物种可能为科学家提供一些领悟，但仅仅为了研究的目的而饲养这些动物的话，其饲养成本是不合理的。

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Animals description, their regions and endangered species of the world can also be seen.

也可以看出动物的描述，他们的地区和世界濒危物种。

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It tells about efforts to save several species of endangered animals.

VOA: special.2009.11.18

In addition to common business challenges like financing and securing customer contracts, the group has spent the better part of the last ten years navigating the National Environmental Policy Act, which means showing why a refinery won't negatively affect everything from flowers and shrubs to endangered species of animals.

FORBES: Not In My Backyard

When gray wolves were listed under the Endangered Species Act in 1974, Minnesota hosted one of the only remaining populations of the animals in the lower 48 states.

CNN: Minnesota wolves considered for delisting

If Ms Williams does not intend to induce human horror at a pending bestial Armageddon, she at least invokes a future of earthly loneliness, where animals appear only as ceramic-hen butter dishes and endangered-species elastoplasts.

ECONOMIST: American fiction (2)