平稳流的英文：
stationary stream

stationary是什么意思：
a.
1.不动的；不增减的；定居的；常备军的
n.
1.不动的人（物）；常备军

stationary stay
中心架|固定支柱

He crashed into a stationary bus.
他撞了一辆停着不动的公共汽车。

A stationary ball in lawn bowling; a jack.
做靶子的球草地保龄球中的静止不动的球；作靶子的目标球

electrostatics refers to stationary arrangements of electrical charge
静电指的是电荷的静止分布。

This relates to a moving disc in contact with a stationary one
它针对的情况是一个运动的圆盘与另一个静止的圆盘相接触。

stream是什么意思：
n. 小河，溪；潮流；流，股；一连串；班，组
v. 飘扬；流；涌进，涌出；照射；按能力分班（组）

Droplets become streams,and streams,rivers
大江不舍细流

The stream splits into three smaller streams at this point.
这条溪在这里分岔出三条小溪。

The small streams rise when the main stream is high; when the main stream is low, the small streams nm dry.
大河有水小河满，大河无水小河干。

Cross the stream where it is shallowest
渡溪当自浅处过

A horse is drinking water in the stream.
马在溪中饮水。