英汉词典

1. 比;比率;比例
    A ratio is a relationship between two things when it is expressed in numbers or amounts. For example, if there are ten boys and thirty girls in a room, the ratio of boys to girls is 1:3, or one to three.

    e.g. 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。
    e.g. The bottom chart shows the ratio of personal debt to personal income...
           下面的图表显示了个人负债与个人收入之比。