| 单词 | dust-free |
| 释义 | > as lemmasdust-free dust-free adj. ΚΠ 1925 W. N. Shaw & J. S. Owens Smoke Probl. Great Cities xi. 211 When breathing dust-laden air, it is only after long periods of quiet breathing that the air from the deep parts of the lungs is dust free. 1934 Discovery July 184/1 Bringing the surfaces together in a clean and dust-free condition. < as lemmas |
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