There isn't a speck of dust anywhere in the house.
整间房子一尘不染。
《牛津词典》
There wasn't a speck of dust anywhere in the room.
屋子里一尘不染。
Billy leaned forward and brushed a speck of dust off his shoes.
比利俯身刷掉鞋上的一点灰尘。
《柯林斯英汉双解大词典》
Whether a speck of dust is man-made or natural can be worked out from its trajectory.
ECONOMIST: Orbital debris
Physically, the DNA carrying all that information is no bigger than a speck of dust.
BBC: DNA 'perfect for digital storage'
Heron Island, for example, is a speck of land on the Barrier Reef inhabited mostly by birds.
NPR: Pacific Island Cultures Brace for Climate Change
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