其中最著名的是1973年的《濒危物种法案》,该法案旨在保护濒临灭绝的动物物种。
The biggest was the Endangered Species Act of 1973, which protects imperiled animal species from extinction.
2008年5月14日,美国内政部根据濒危物种法案把北极熊重新分类为濒临灭绝的物种,引用了对海冰损失的关切。
On May 14, 2008, the U. s. Department of the Interior reclassified the polar bear as a Threatened Species under the Endangered Species Act, citing concerns about sea ice loss.
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