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。