差額的英語翻譯：

balance; margin
【經】 balance; difference

一定的英語翻譯：

certainly; surely; all to nothing; by all means; to a certainty

比例的英語翻譯：

proportion; proportionment; scale
【計】 R
【醫(yī)】 proportion; ratio
【經】 percentage; ratio; scale

數的英語翻譯：

a few; count; enumerate; fate; frequently; list; number; numeral; numeric
reckon; repeatedly; serveral
【計】 crossing number; N
【醫(yī)】 number
【經】 number