然而，他警告在日本的捕猎可能危害白腰鼠海豚的亚种的安全，尽管白腰鼠海豚全种在地球上有一百多万只。

Still, she cautions that it's possible that the Dall's porpoise hunt in Japan may harm subpopulations of that animal, which numbers more than a million worldwide.

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海豚可能是人类之后地球上第二聪明的生物，但是专家警告海豚智力的科学案例是基于相当少的数据的。

Dolphins may be Earth's second smartest creature after humans, but experts caution that the scientific case for dolphin intelligence is based on relatively little data.

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