These plants float on the surface of the water.
这些植物漂浮在水面上。
A few brief words, make the pain float on the surface in my heart.
短短几句话，让我心中的痛，又浮到最上层。
Because the duck walked in the water, feet can be reduced buoyancy, can float on the surface of the water, and won't sink.
因为鸭子在水中行走的时候，脚可以减少浮力，能浮在水面上走，而不会沉下去。
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