Commutant
换位子群, 导出群
🗣️ 情景例句
Too easy for you?
对 ，太容易了
That which is evil is soon learnt.
恶行易学。
The use of gloves was not introduced until 1860, when the Marquis of Queensberry drew up the first set of rules.
1860年昆斯伯里侯爵第一次为拳击比赛制定了规则，拳击比赛这才用上了手套。