cloud是可数名词吗?

1.做“云”讲既可做可数也可做不可数名词，如A sky without a speck of cloud.万里无云；a white cloud 一朵白云；

2.做“云状物、一大群”时可数，如漫天灰尘 a cloud of dust；

3做“阴影、暗物” 时可数，如战争的阴云the clouds of war.

The sun burst through the clouds.

太阳破云而出。

I don\'t like the look of those clouds.

看那些云的样子，我觉得可能要下雨。

The plane was flying in cloud most of the way.

飞机一路大多在云层里飞行。

The sky was full of dark masses of clouds.

天空中乌云密布。

A cloud of dust rose as the truck drove off.

卡车开过时扬起一片灰尘。

The sun disappeared behind a bank of clouds.

太阳消失在一大片云后面。