There are two modes for charging with the Payment Web service: charge by amount and charge by volume.

存在两种使用支付Web服务进行收费的模式：按流量收费和按批量收费。

youdao

The new results increase the water estimate to about 40 gallons, and by estimating by amount of dirt excavated by the impact, calculated the concentration of water for the first time.

新的研究结果表明除掉撞击中所产生的尘埃物质外，估计的含水量增加到40加仑，这是首次测算水密度。

youdao

The amount of carbon dioxide released by human activities such as burning coal and oil is small in comparison.

相比之下人类燃烧煤、石油等活动所释放的二氧化碳的量是少的。

《柯林斯英汉双解大词典》

Unpleasant smells can be prevented by controlling the amount of food waste added to the bin and avoiding meat or bones.

VOA: special.2011.07.05

the total amount of the work that we can get out is just given by the area inside this curve.

能够输出的功就是,我们可以得出来,曲线所包围的面积。

麻省理工公开课 - 热力学与动力学课程节选

Why should the amount by which you're attracted to the Earth be also a measure of how much you hate acceleration?

为什么物体受地球引力的大小,恰好能衡量物体加速的难易程度呢

耶鲁公开课 - 基础物理课程节选

At the end of two weeks, examine your spending by amount and category.

FORBES: Being Played by the Players

New share offerings have had the slowest start in three years and are down 43% compared with last year by amount of money raised.

WSJ: Investors Lose Patience for Hong Kong IPOs

So whatever carbon benefit biofuels do produce should be reduced by the amount released by new farming.

FORBES: U.S., Europe Going Opposite Way On Biofuels