So, as these products form, they continue to fall out of the way and keep this interface open.

因此随着产物的生成,金属钛会下沉，使得界面仍然保持开放。

麻省理工公开课 - 固态化学导论课程节选

When you're afraid, you've got this sinking feeling in the stomach.

当你害怕时,你会有胃部下沉的感觉

耶鲁公开课 - 死亡课程节选