久青草国产手机视频免费观看_毛片网站是多少_亚洲视频中文_一区二区高清在线

首頁英語詞典groupgroup英英釋意

group

英 [gru?p] 美[ɡrup]
  • n. 組;團體
  • adj. 群的;團體的
  • vi. 聚合
  • vt. 把…聚集;把…分組

英英釋意


1. any number of entities (members) considered as a unit
2. (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
3. a set that is closed, associative, has an identity element and every element has an inverse