词族 · subset
词形变化
中文词源
subset 分组，子集
sub-,分支，分部，分，set,套，组，集。
英语词源
- subset (n.)
- also sub-set, "subordinate set," 1897, originally in mathematics, from sub- + set (n.1).
权威例句
- 1. Each subset is determined by some occurrence of these three events.
- 每一个子集,由这三种事件出现的情况而决定.
- 2. A subset S of a ring A is a subring of A.
- 环A的子集S叫作A的子环.
- 3. This would enable the production of subset catalogues by subject.
- 这将使按主题编制子集合目录成为可能.
- 4. The null subset corresponds to the term 1.
- 空集则对应于常数项1.
- 5. A cut of a tree is a subset of its nodes with the following two properties.
- 一颗树的切割是此树具有以下两个性质的节点子集.