| 单词 | ultraclean |
| 释义 | ultraclean[ uhl-truh-kleen ] / ˌʌl trəˈklin / adjectiveextremely clean, especially free of germs: an ultraclean laboratory. Origin of ultracleanFirst recorded in 1965–70; ultra- + clean Words nearby ultracleanultisol, ulto., ultra, ultrabasic, ultracentrifuge, ultraclean, ultraconservative, ultracrepidarian, ultracritical, ultradian, ultra-distance Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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