不过，科学家们认为，尽管沙锥齿鲨锋牙利齿的外表很吓人，但它们实际上是性情温和的动物，只有被激怒时才会咬人。
Biologists from Macquarie University in Sydney insist that grey nurse sharks, while terrifyingly toothy in appearance, are mild creatures which will bite humans only if provoked.
地点 ：希拉毒蜥是一种耐力极好、会咬人的动物，它生长在美国西南和墨西哥北部沙漠地带，而它的近亲墨西哥毒蜥通常栖息在墨西哥南部茂密的丛林中。
Location: The Gila monster is found in the desert areas of the southwestern United States and northern Mexico. The Mexican Gila monster is normally found in the dense forests of southern Mexico.
我知道大多数的蛇是不咬人的，但是每当我看到蛇，我全身就会起鸡皮疙瘩，哪怕是在动物园里看到蛇也是如此，真是没办法。
I know that most snakes are harmless, but I can't help it — every time I see a snake, even in a zoo, I get goose bumps all over!
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