favorable current

例句：

1. 1. The favorable current iscarrying the water downstream.
   有利的水流将水带往下流。
2. 2. The electrical engineer used a favorablecurrent to power the machine.
   电气工程师使用一个有利的电流来给机器供电。
3. 3. The favorablecurrent helps to reduce the friction between themoving parts.
   有利的电流有助于减少移动部件之间的摩擦。