(noun.) any number of entities (members) considered as a unit.
(noun.) a set that is closed, associative, has an identity element and every element has an inverse.
(noun.) (chemistry) two or more atoms bound together as a single unit and forming part of a molecule.
(verb.) arrange into a group or groups; 'Can you group these shapes together?'.
(verb.) form a group or group together.
阿德拉录入
德斯蒙德录入