定比的用法和樣例：
例句
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提成率應按照采用轉讓技術(shù)生產(chǎn)出來(lái)的產(chǎn)品純銷(xiāo)售額的一定比例來(lái)計算。
The royalty rate shall be calculated in proportion to the net sale of the product turn out with the transferred technology. -
富有的人不一定比別人幸福。
A person is no happier because he rolls in wealth.
