There is a velocity difference across the radius of the pipe.

这条管道半径两端间存在一速度差。

youdao

There is a very big difference in physics between speed and velocity.

物理中速率和速度的概念,是泾渭分明的。

youdao

There is a very big difference in physics between speed and velocity.

物理中速率和速度的概念,是泾渭分明的。

youdao