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1·A dark cloud of bees comes swarming out of the hive.

黑压压的一大群蜜蜂从那座蜂巢涌过来。《柯林斯英汉双解大词典》

2·The only dark cloud on the horizon was that they might have to move house.

唯一的忧虑是他们可能要搬家。《牛津词典》

3·A dark cloud passed over the sky.

一朵乌云从天上掠过。《新英汉大辞典》

4·A dark cloud is a sign of rain.

乌云是降雨的预兆。

5·A dark cloud is a sign of rain.

乌云是降雨的信号。

6·Stars are forming within the dark cloud.

恒星正在该暗星云中形成。

7·I'll leave a dark cloud.

我只会留下一片黑雾。

8·The banks of dark cloud promised rain.

天上片片乌云，就要下雨了。

9·The sun disappeared behind a dark cloud.

太阳在一片乌云后不见了。

10·The weather was dark cloud was densely covered.

天气是黑暗的云彩密集地被盖了。

乌云

1·A dark cloud passed over the sky.

一朵乌云从天上掠过。《新英汉大辞典》

2·I want to teach men the sense of their existence, which is the Superman, the lightning out of the dark cloud — man.

我想要把生存的意义传授给世人，那意义就是超人，那就是冲破人类乌云的——闪电。

3·All this is a dark cloud on an otherwise bright horizon for the global economy.

就其他方面而言全球经济正处于美好的地平线，这一切却是飘于其上的乌云。

4·Behind the simple, so I did not notice big chunks dark cloud in the wind storm.

单纯的背后，让我一点也没有察觉大块大块乌云在乘风作浪。

5·Black water disciple seeing that already completely red and red figure drive black deeply of dark cloud package, don't live countermarch, although still keep stubbornly standing, clear is spent force.

黑水门徒只看到那个已经完全赤红的身影被黑透了的乌云包裹，不住后退，虽然依旧顽强地站立着，却分明是强弩之末。

黑云

1·The crises has created opportunities. That might be the only silver lining in the dark cloud of controversy.

丰田危机给美国带来机会，这可能是黑云密布的争论中唯一的闪光点了。