1. We were bowling along (the motorway) at seventy miles per hour.
   我們以每小時(shí)七十英里的速度(在高速公路上)飛馳。
2. The vessel tax of anchorage is 5,000 dollars per year.
   這艘船的停泊稅一年是五千美元。
3. Public houses are licensed to sell alcoholic drinks for a certain number of hours per week.
   酒店執(zhí)有酒類經(jīng)銷許可證，每周可按一定時(shí)數(shù)出售。
4. He told me that middle C is equivalent to 256 vibrations per second.
   他告訴我說(shuō)中央C音相當(dāng)于每秒振動(dòng)256次。
5. Force applied uniformly over a surface, measured as force per unit of area.
   壓力; 壓強(qiáng)統(tǒng)一作用于物體表面的力量，用每一單位面積上的壓力計(jì)量
6. The hurricane has a speed of 73 miles per hour.
   颶風(fēng)每小時(shí)73英里。
7. Out of each hundred; per hundred.
   百分之出于每一百; 每一百
8. These apples cost five yuan per kilogram.
   這些蘋果每公斤五元。

per

prep.Abbr. p.（介詞）縮寫 p.
To, for, or by each; for every:
每一，每：對(duì)、為或通過(guò)每一個(gè)；每一個(gè)：
例句：
Gasoline once cost 40 cents per gallon.
汽油曾賣到每加侖40美分

Usage Problem According to; by:
【用法疑難】 根據(jù)；依照：
例句：
Changes were made to the manuscript per the author`s instructions.
根據(jù)作者的提示，手稿做了改動(dòng)

By means of; through.
經(jīng)，由：以…方式；通過(guò)
adv.Informal （副詞）【非正式用語(yǔ)】
For each one; apiece:
每一個(gè)地：為每一個(gè)；每個(gè)，每人：
例句：
sold the cookies for one dollar per.
蛋糕賣一美元一塊

Per hour:
每小時(shí)地：
例句：
was driving at '0 miles per.
以每小時(shí)'0英里的速度開(kāi)車

來(lái)源：
Latin * see per
拉丁語(yǔ) *參見(jiàn) per

Per is appropriately used in the description of ratios (
Per 適用于描述比率(
例句：
five miles per day;
five miles per day;

例句：
20 dollars per person).
20 dollars per person)。

In its more general use to mean .according to. (as inper the terms of the contract ), it is best reserved for business and legal communications,unless the writer seeks a tone of jocular formality.
更普遍的意思是.根據(jù).（如見(jiàn) per the terms of the contract )， 最適于商業(yè)和法律交流，除非作者想尋求一種滑稽的正式口吻