油有浮在水上的特性。
谁都清楚，要在这样一个漂浮在水上的城市里不迷路简直是不可能的，它就像一个迷宫，会让你分不清东南西北。 与其如此，还不如就跟着感觉走。
As everyone knows, to be in that floating city is to be forever lost and disoriented, as if in a labyrinth.
土星的密度只有水的0.7倍，也就是说土星可以浮在水上。
Saturn has a density of only 0.7 that of water, which means that Saturn would float in water.
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