词汇列表

U

u uc uganda ugly uh ui uk ukraine ul ultimate ultimately ultra ultram um un una unable unauthorized unavailable uncertainty uncle und undefined under undergraduate underground underlying understand understanding understood undertake undertaken underwear undo une unemployment unexpected unfortunately uni unified uniform union unions uniprotkb unique unit united units unity univ universal universe universities university unix unknown unless unlike unlikely unlimited unlock unnecessary unsigned unsubscribe until untitled unto unusual unwrap up upc upcoming update updated updates updating upgrade upgrades upgrading upload uploaded upon upper ups upset ur urban urge urgent uri url urls uruguay urw us usa usage usb usc usd usda use used useful user username users uses usgs using usps usr usual usually ut utah utc utilities utility utilization utilize utils uv uw uzbekistan