rate 和 ratio 在意义和用法上有什么区别么

rate 和ratio 在意义和用法上有什么区别么？
1.rate:比率，比值，率，等等。

eg. tax rate,crime rate
一般表达为：10%，70km/h 等。

2.ratio:两个量的比值，强调对比、相除的关系。

应用时其指代的这两个量必须在上下文中出现。

eg.Men outnumber women here in the ratio of three to one.
一般表达为：2:3
Rate是率，速率啊什么的。

打个比方
The car was going at the rate of 60 miles an hour.
The unemployment rate is rising in that country.
Ratio是比，就是数学上的那个。

The ratio of 15 to 5 is 3 to 1. 15：5=3：1
∙ratio 与rate 的区别与用法：
Rate and ratio are numbers of the same kind. They usually explain the equivalence（等值；相等）of one from the other. These two are used in mathematics to better understand and distinguish a
matter’s proportion or value. In this way, it will be easier to distinguish and know the value from to another.
Rate
Rate is the relationship of two measurements that have various units单位. The quantity or unit, where a particular thing is unspecified未指明的, is generally the rate per unit time. Nevertheless, the rate of alteration变化；转变can be named as per unit of length, mass块，团or time. The most common kind of rate is time, like heart rate and speed. When it comes to describing the unit rates, the term “per” is used to divide the 2 measurements that are used to compute the rate.
Ratio
Ratio is the connection of 2 numbers that have the same type. It is commonly expressed as a: b or
a is to b. At times, it is expressed mathematically as the dimensions quotient of the 2. This means
the number of times the 1st number contains the 2nd one (not essentially a figure.)
∙Difference between Rate and Ratio
Rate pertains to fixed quantity between 2 things（rate形容两个事物的一定数量）while a ratio is the relationship between lots of things（ratio形容许多事物之间的关系）. A unit rate can be written as 12 kms per hour or 10km/1hr; a unit ratio can be written in this manner 10:1 or is read as 10 is to 1. A rate usually pertains to a certain change while a ratio is the difference of something.
A rate usually focuses on physics and chemistry, mostly measurements, terms like the
measurements of speed, heart rate, literacy rate and, etc.（rate通常指物理和化学的测量，如速
度，心率，识字率等）while ratio can be of any object, thing, students or persons（ratio 可指任何物体，事物，学生或人等）.
Rate and ratios are very important in explaining the equivalence from one and the other. A rate cannot be one if ratio does not exist. You don’t even notice that these two are still being used in our day to day living like calculating bank interest, product cost and many more. Life has been made easier because of these two.
In brief:
• Rate will not exist if Ratio did not exist.
• Rate is used for measurements
• R atio is used for other kinds of things.。