cloud和rain可数吗

答rain是不可数的，cloud是可数的。

例句The plane disappeared behind a cloud.

飞机消失在云层里。

Fog and low cloud cover are expected this afternoon.

预计今天下午有雾和低空云层。

The city is covered by a foul-smelling cloud of smoke.

城市被一团恶臭的烟云笼罩着。

The moon was fuller than the night before, but the light was diffused by cloud.

月亮比头一天晚上更圆，但因云层遮掩而月光朦胧。

The Sun, Moon, and the planets formed from a huge spinning gas cloud that collapsed into a gyrating disc.

太阳、月亮和这些星球形成于倒塌进一个旋转盘状物的一团巨大旋转汽云。