1.And should you drop it into a tubful of cloudy, child-colored water, not to worry — it floats.

1.而且，如果慎将香皂落入澡盆，里面盛满了孩子们洗过澡的浑水，用担找——自动浮上水面。

2.Because of water's latent heat capacity, a tubful of water placed in a greenhouse on a night of freezing cold will act as a reserve supply of heat.

2.因为水的这种潜热容量，在滴水成冰的夜晚置于温室中的一管水可起保温热源的作用。