名詞 proportional:

1. one of the quantities in a mathematical proportion

形容詞 proportional:

1. properly related in size or degree or other measurable characteristics; usually followed by `to'
   同義詞：relative
2. (of taxes) increasing as the amount taxed increases
   同義詞：graduated
3. having a constant ratio

1. A proportional share, as of goods, assigned to a group or to each member of a group; an allotment.
   定額一定比例的份額，如貨物，分配給一組或一組中的每個成員; 配給物
2. Pertaining to a device that operates in a proportional or continuous manner, such as an analog amplifier. Not discrete or digital, but analog.
   用于修飾或說明一種設備(工作特性)的術(shù)語，這種設備以成比例或連續(xù)方式進行工作，例如用于說明模擬放大器的工作特性不是離散的或數(shù)字的，而是模擬的。
3. A pictorial representation of numerical data or relationships, especially a graph, but having each value represented by a proportional number of pictures.
   統(tǒng)計圖表，象形圖用圖畫表現(xiàn)數(shù)字的信息或關系，尤指圖表，但用有比例的一定數(shù)字的圖畫來代表每種價值

pro.por.tion.al

adj.Abbr. P.R.（形容詞）縮寫 P.R.
Forming a relationship with other parts or quantities; being in proportion.
成比例的：與其余部分或數(shù)量形成一種關系或比例的；成比例的
Properly related in size, degree, or other measurable characteristics; corresponding:
協(xié)調(diào)的：在大小、程度或其他可測量的特點方面恰當?shù)叵嚓P的；相對應的：
例句：
Punishment ought to be proportional to the crime.
懲罰應該與所犯的罪相應

Mathematics Having the same or a constant ratio.
【數(shù)學】 成常比的：有相同的或恒量的比率的
n.（名詞）
One of the quantities in a mathematical proportion.
比例項：在數(shù)學上成比例的數(shù)或項之一

【引伸】
propor.tional.ity
propor.tionally
adv.（副詞）