在2009年，因为加拿大和美国那个寒冷的夏天，冬天来到墨西哥的帝王蝴蝶创下了自1994年有记录以来最低水平。

A cold summer in Canada and the United States in 2009 meant that the following winter saw fewer monarchs in Mexico than at any time since records began in 1994.

youdao

如果这是真的，那么为什么像蛇、蜥蜴、乌龟和鳄鱼这样的冷血动物能在寒冷的冬天和炎热的夏天存活下来呢？

If true, though, why did cold-blooded animals such as snakes, lizards, turtles, and crocodiles survive the freezing winters and torrid summers?

youdao

天气还不是最冷的时候，但即使在夏天，风也是寒冷刺骨。 当驼背鲸哼哼着经过我们的船头向塞尔米利克峡湾游去时，我们闻得到它的口臭。

It is not freezing but even in summer the wind is bitingly cold and we can smell the bad breath of a humpback whale as it groans past our bows on Sermilik Fjord.

youdao