rate和ratio的区别：中文含义不同、词性不同、用法不同。rate可作名词和动词两种词性，基本含义有“速度”、“比率”、“价格”、“房地产税”、“评价”、“认为…是好的”、“划分等级”、“配得上”；ratio只作名词，是可数名词，基本含义为“比率”、“比例”。

1、当rate作为名词时，意为速度;进度;比率;率;价格;费用;房地产税，房产税。

例句：Most people walk at an average rate of 5 kilometres an hour.

大多数人步行的平均速度为每小时5公里。

The number of reported crimes is increasing at an alarming rate.

报警案件的数量正在以惊人的速度增长。

Figures published today show another fall in the rate of inflation.

今天公布的数字表明通货膨胀率又一次下降。

Local businesses are closing at a/the rate of three a year.

地方企业正在以每年三家的速度关闭。

We offer special reduced rates for students.

我们对学生有特惠价格。

2、当rate作为动词时，意为评估;评价;估价;认为…是好的;看好;划分等级;分等;值得，配得上（某种对待）;对（电影或录像片）分级。

例句：The university is highly rated for its research.

这所大学因其研究工作而受到高度评价。

I'm afraid our needs do not rate very high with this administration.

我们的需求恐怕不会受到这届政府的多大重视。

What did you think of the movie? I didn't rate it myself.

你觉得这部电影怎么样？我本人认为不怎么样。

She is currently rated number two in the world.

她目前排名世界第二。

The incident didn't even rate a mention in the press.

这件事在报纸上连提都不值得一提。

ratio作为可数名词，意为比率;比例。

例句：What is the ratio of men to women in the department?

这个部门的男女比例是多少？

The school has a very high teacher-student ratio.

这所学校的师生比例很高。

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。

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。

The quantity of ambiguity and restrictive condition are in the direct ratio.

歧义的数量与限制条件的数量成正比。

The personal contribution ratio is voluntary in the annuity program.

企业年金中个人缴费比例是自愿的。

Low energy consumption, high output and big reduction ratio;

能量消耗小、产量高、破碎比大。