太阳系已命名的卫星数量和已命名的行星数量比例要大于20：1。

The named moons of the solar system outnumber planets by more than 20 to 1, and they display a remarkable diversity.

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科学家们计算出全球用于生产肉食的植物性食物数量比例达到5比1。

Scientists have calculated that globally the ratio between the amounts of useful plant food used to produce meat is about 5 to 1.

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贷款信用不佳的房主数量比例则在一年前的5.6%的基础上又增加了7个百分点。

The percentage of homeowners delinquent on mortgage payments rose to 7 percent, up from 5.6 percent a year ago.

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So at Brown, um, I'd say maybe Asians are fifteen percent, a representative of overpopulation ,

在布朗大学，亚洲人的比例大概是15%，是典型的亚洲人数量过多，

尊重多样化 - SpeakingMax英语口语达人

If X is the number of cells, then the rate of change of X, dX/dt, the rate of change of the cell population, how fast division is taking is proportional to the number of cells I have.

如果X是细胞数目,那么X的改变率就是dX/dt,就是细胞数目的改变率,分裂的速度有多快,和细胞数量呈比例关系

耶鲁公开课 - 生物医学工程探索课程节选