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单词 ultrafine
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ultrafine

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Examples of 'ultrafine' in a sentence
ultrafine

Ultrafine particles are particularly damaging to human health because they are small enough to cross the membranes in our lungs.A special filter on the roof removes ultrafine particles then blows purer air out behind it.Standing on the deck, downwind of a ship's funnel, investigators found air pollution of 84,000 ultrafine particles per cubic centimetre.The exfoliatory element was so ultrafine as to be barely detectable, but skin felt smooth and moisturised afterwards.
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更新时间:2024/12/22 21:27:36