Cells in the heart depend on the flow of potassium to work properly.

心脏细胞依靠钾的流动来正常工作。

My research is on the flow of air really close to the surface of planes.

我研究的是靠近飞机表面的气流。

The agreement also called for ending restrictions on the flow of goods, services and investment among the three countries.

该协议还呼吁结束对美国、加拿大和墨西哥的货物、服务和投资流动的限制。

Cracks and joints in a concrete  spillway have an effect on the flow inside.

混凝土溢洪道中的裂缝和接缝会影响内部的流量。

While there was fear and death inside the school, the sun shone on the flowers outside, and on the flowing streams in the valleys.

学校里充满了恐怖和死亡，而外面却是阳光照耀着的花朵和山谷间流淌的小溪。