爱词霸英语   汉语   手机版   软件版下载 | English
每日一句:正在加载...
1.A fish has a swimming bladder inside it—that is, a sack containing air. If it wants to dive deep down and stay down, it squeezes out some of the air and lets in water.
鱼肚里有鱼鳔，也就是盛空气的袋子，如果它要潜下深水不上来时，就吐出一些空气，把水换进去。收藏指正
尝试查询
汉英释义
n. 鱼鳔