評論
打印
Ratio
比率
If there are four girls and eight boys in your class, you may say there are two times as many boys than girls in my class.
如果你班上有四個女生和八個男生，你可能會說我班上的男生是女生的兩倍。
This expression uses the ratio.
這個表達用到了比率。
A ratio does not tell you the number of all the students which is the sum of the two groups.
比率并沒有告訴你所有學(xué)生的人數(shù)，即兩組的人數(shù)總和。
However, it explains the relationship between the number of boys and the number of girls.
但是，它解釋了男生數(shù)量和女生數(shù)量之間的關(guān)系。
When we express the ratio, we use the colon mark.
當(dāng)我們表示比率時，我們用冒號。
For example, the ratio of girls to boys in the example above is one to two.
例如，在上面的例子中，女生與男生的比例是1：2。
It means there are two boys for every one girl.
這代表著兩個男生對應(yīng)一個女生。
A ratio is very important to understand the characteristics of a large group.
比率對于理解一個大群體的特征非常重要。
