20-03-17 鲸鱼是哺乳动物，因此在很多方面它们和人类很像。最重要的区别是鲸鱼和人类的生活环境不同。那么鲸鱼睡觉吗？鲸鱼是如何睡觉的的呢？ Whales are mammals, so in many ways, they are just like human beings. The most important difference is that humans and whale...

20-03-12 鲸鱼不是鱼，而是整个一生都生活在水里的哺乳动物。 Whale is the common name for various marine mammals of the order Cetacea. Whales breathe air and are not fish. They are mammals that spend their entire lives in the water. Whales are of two types: too...