n.比,比率,比例,系数
vt.求出比值,除,使…成比例,将(相片)按比例放大[缩小]
In 1978 there were 884 students at a lecturer/student ratio of 1:15.
1978年有884名学生,师生比为1比15。
The adult to child ratio is 1 to 6.
成人与儿童的比例为1比6。
What is the ratio of men to women in the department?
这个部门的男女比例是多少?