aspect ratio 纵横比
sex ratio 性别比例
profit-to-loss ratio 利润与亏损比
ratio of A to B A与B的比率
A: What are the ratios for this chemical mixture?
A：这种化学混合物的比例是多少？
B: They must be exact to ensure a safe reaction.
B：它们必须精确，以确保反应安全。
1) 两个数值之间的比值
2) 事物间的相对规模关系
3) 数学或统计中的比例概念
1. 比例，比率
noun
1. The quantitative relation between two amounts showing the number of times one value contains or is contained within the other.
Synonym: proportion, rate