cloud是可数名词吗

cloud双语例句：

1、a cloud of chaff, for decoying radar-guided missiles

迷惑雷达制导导弹的'干扰云

2、The scandals still cloud MCI's reputation.

这则丑闻仍然损害着微波通信公司的声誉。

3、The night was dark, the stars hidden behind cloud.

那个夜晚很黑，星星躲在云后面。

4、Another cloud of witnesses compasses me about.

又一群目击者把我围了起来。

5、The American edition of `Cloud Street' is already in its third printing.

美国版《云街》已是第三次印刷了。