But,once the fire is out, the well still needs to be covered,or capped, to stop the flow of oil.

VOA: special.2009.03.22

They had these characters that would operate according to water flow and so if you stepped on a certain panel, a swordsman would jump out with a sword.

园林中有很多人偶造型,可以运用水流来控制他们的动作,当你踏上相应的踩踏板,一个剑客便会跳出来向你挥剑

耶鲁公开课 - 心理学导论课程节选

This makes it difficult for air to flow in and out of the lungs.

VOA: special.2009.07.28