The plastic tarp that serves as the roof of her house fills with water when it rains.

VOA: standard.2010.03.29

In one case you decided to order in terms of energy and in one case you decided to order in terms of how it fills up.

第一种情况中你们决定,用能量排序,另一种情况中你们决定用它,如何填充排序。

麻省理工公开课 - 化学原理课程节选