图片来源：Flickr
37. Sea horses get "married".海马会“结婚”。
图片来源：Unsplash
38. Chinchilla fur is so dense that it's very bad for them to get wet. So instead of bathing in water, they bathe in dust.毛丝鼠的毛太密，所以一旦湿了就很麻烦。所以它们不在水里洗澡，而在尘土里“洗澡”。
图片来源：Flickr
39. Dolphins have names for one another.海豚们都有自己的名字。
图片来源：Flickr
40. Dragonflies and damselflies form a heart with their tails when they mate.蜻蜓和豆娘在交配时会用尾巴摆出一个心形。
