变率可变比例可变比值variable: adj. 1.易变的,变化无常的,无定的 (opp. c ...ratio: n. (pl. ratios) 1.比,比率,比值;比例 ...ratio variable: 比率变量variable-ratio: 可变比continuously variable ratio transmission: 无级调速变速器下载手机词典可随时随地查词查翻译