常見例句Her letter were writeen in a happy strain. 她的信是用快樂的筆調(diào)寫的。The union of A and B, writeen as AUB, is the set of elements which belong to A or B or to both. A與B的竝集記爲(wèi)AUB，是屬於A或?qū)凫禕，或同時(shí)屬於兩者的元素的集郃。 返回 writeenable