ratio 英 [ˈreɪʃiəʊ] 美 [ˈreɪʃioʊ] n. 比例; 比，比率; 系数; vt. 求出比值，除，使…成比例; 将（相片）按比例放大[缩小]; [例句]In 1978 there were 884 students at a lecturer/ student ratio of 1:151978年有884名学生，师生比为1比15。[其他] 复数：ratios
以较低的比率At a lower rate 在所有研究过的动物身上都发现到，每天花在REM睡眠期的比率，以生命初期为最高，之后会渐渐降到成年时稳定但较低的比率。In all animals studied, the portion of each day devoted to REM sleep is highest early in the subject's life and falls gradually to a steady, lower level in adulthood.
考小拉考小花
