四中取一選擇電路one: Once one is one. 一乘一等于 ...out: adv. 1.〔位置及運(yùn)動(dòng)的方向〕向外,向外部;在外,在 ...one out: 失去第一次發(fā)球權(quán)one by one they got out: 他們一個(gè)一個(gè)地走了出去walk out of the classroom one by one: 一個(gè)接一個(gè)走出教室下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯