Aún no tenemos significados para "black cumulus".
1The leaden layer broke up into black cumulus clouds, that slowly careered across the canopy of the sky.
2A spatter of dots formed in the middle of my field of vision, coalesced, then spread outward as a black cumulus.
3While I had been focusing on the alien creature to the north, a billowing, black cumulus had all but surrounded me to the south.
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