With so many variables, it is difficult to calculate the cost.

　　有這么多的可變因素，很難計算出成本。

　　It is impossible to calculate what influence he had on her life.

　　現在無(wú)法估計他對她的生活產(chǎn)生過(guò)多大影響。

　　Fees are calculated on a sliding scale according to income.

　　按浮動(dòng)費率制根據收入高低計算收費。

　　Benefit is calculated on the basis of average weekly earnings.

　　補助金按平均周收入計算。

　　It has been calculated that at least 47 000 jobs were lost last year.

　　據估算，去年至少47000人次失去了工作。