狗是我们忠实的朋友。它有可爱的地方,也有奇怪的地方。天热的时候,狗会把舌头伸出来,喘着粗气。你知道这是为什么吗?原来狗的汗腺没有人发达,而狗毛形成了一个隔热层,阻挡了热量的散发,这就导致了在炎热的夏天,狗也怕热。它张大嘴,伸出舌头,这样体内的热量就可以通过舌头表面散出去一部分。 Dogs are our loyal friends. It has lovely places, there are strange places. When the weather is hot, the dog will stick out his tongue and gasping. Do you know why? The dog’s sweat glands are not well developed, and the dog hair forms a thermal barrier that blocks the heat from escaping, which causes the dog to be scared of heat in the hot summer. It opened its mouth, sticking out the tongue, so that the body’s heat can be dissipated through the surface of the tongue part.