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鱼出汗了老师:同学们,谁能说说海水为什么是咸的?小华:我知道。因为海里的鱼太多,游得太快,出汗太多,所以海水变咸了。
Sweaty fish teacher: Students, who can talk about why salty water? Xiaohua: I know. Because too many fish in the sea, swim too fast, too much sweat, so saltwater salty.