常用詞語(yǔ)和句型：
proportion 比例
proportional 比例的，成比例的
proportionally 成比例地，按比例
proportionate 成比例的，相稱的
proportionately 成比例地
disproportionately 不成比例地
ratio 比，比率
in a / the proportion of ... 與…成正比
(be) in a / the ratio of ... to ... 是…與…之比
in the proportions of ... to ... 按…比…的比例
(be) proportional to ... 與…成正比
(be)out of proportion to ... 與…不成比例
the + 比較級(jí) , the + 比較級(jí) 越…，越…
A proportion of one part by volume of acid to three parts by volume of water should be used．
應(yīng)使用按體積 1 份酸 3 份水的比例。
Hydrogen and oxygen are present in water in the proportions of 1 to 8 by weight．
氫和氧按重量 1 比 8 的比例存在于水中。
The areas of triangles standing on the same base are proportional to their heights．
同一底邊的三角形的面積與它們的高度成正比。
The pronts of the enterprise will be divided proportionally among the participants on the basis of
the work each one does．
這一事業(yè)的利潤(rùn)將根據(jù)每個(gè)參加者所做的工作按比例分配。
As the demand for power increases , the supply is proportionately increased．
隨著對(duì)電力需求的增長(zhǎng)，供電量也成比例地增長(zhǎng)。
Compared with the human adult , the new-born human baby has a disproportionateJy large head．
與成年人相比，新生嬰兒的頭大得不成比例。
An elephant's tail seems out of proportion , to the rest of its body．
大象的尾巴似乎與其身體的其余部分不成比例。
There are l5 parts of air to every part of fuel . They are in a ratio of l5 to 1 .
每 1 份燃料有 15 份空氣。它們之比為 15 比 1。
The air / fuel ratio is 15:1 .
空氣與燃料之比為 15:10
The efficiency is denned as the ratio of the output to the input．
效率可定義為輸出功率與輸入功率之比。
This force is inversely proportional to the square of the distance between the bodies．
這個(gè)力與物體之間的距離的平方成反比。
During expansion the pressure varies inversely as the volume .
在膨脹時(shí)，壓力的變化與體積成反比。
Pressure is in inverse proportion to volume．
壓力與體積成反比。
The solubility of CO2 in sea water is inversely dependent upon the temperature of the water .
二氧化碳在海水中的溶解度與水的溫度成反比。
The higher the velocity of steam , the greater is the turbine speed．
蒸汽的速度越高，渦輪的轉(zhuǎn)速越大。
The higher up we go , the smaller and lighter are the grains of dust in the air．
我們飛得越高，空氣中的塵粒就越小越輕。
(參見 proportion , ratio 等詞條)
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