1. We divided it in the ratio 3:1.
    我们将它分为三与一之比。

2. The ratio of 15 to 5 is 3 to 1.
    十五与五的比率是三比一。

3. The ratio of students to teachers is 35:1.
    学生和老师的比率是三十五比一。

1. 公共查询·英语单词大全

1. 比：常以百分数表示,计算公式为:(式2) 3.比(ratio) 又称为相对比,比较两个指标时用以反映两个有关指标间数量上的比值,如A指标是B指标的若干倍,或A指标是B指标的百分之几,通常用倍数或分数表示.

2. 系数：类似于滑轮的系数,你可以指定一个齿轮系数(ratio),齿轮系数可以为负.另外值得注意的是,当一 个是旋转关节(有角度的)而另一个是移动关节(平移)时,齿轮系数是长度或长度分之一.

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.

公共查询·英语单词

    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。

1. the relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree

    e.g. an inordinate proportion of the book is given over to quotations
           a dry martini has a large proportion of gin

    Synonym: proportion

2. the relative magnitudes of two quantities (usually expressed as a quotient)