机暑假,爸爸带我到北海玩。一看到汹涌澎湃的大海,我便着了魔似的迫不及待地扑进大海的怀抱,像欢的鱼儿一样开心地游起来。游着游着,发觉海水的浮力很大,无论游泳还是潜感觉都跟在游泳池里大不相同。我去爸,他说:“因为海水是咸的。”我疑惑海水是咸的跟浮力大小有什么关系呢? Summer vacation, my father took me to the North Sea to play. As soon as I saw the surging sea, I could not wait to march like a fish into the sea like a happy fish. Swim and swim, found that the buoyancy of the sea is great, whether swimming or subtle feeling with the swimming pool is very different. I went to dad, he said: “Because the sea water is salty.” I wonder what the relationship between seawater salty and buoyancy size?