single和float的区别

single是单的意思，而float则是漂浮意思，区别可以从以下例子看出：

Please jump into the water to learn swimming, be brave, as you are the only single one who just float with floating bag. 请跳进水里学游泳，要勇敢，因为你是唯一单独带着浮袋漂浮的人。