As the name implies, the former allows you to charge by quantity, while the latter allows you to charge by, say, time.
顾名思义，前者允许按数量收费，而后者允许按其他标准（如按时间）收费。
Seller shall furnish with or without charge to Agent reasonable quantity of advertising literatures Catalogs, leaflets, and the like as Agent may reasonably require.
卖方应向代理商提供一定数量的广告印刷品、商品样本、小册子以及代理商合理要求的其他材料。
Finally, employing the equivalent electricity quantity approach, the steady state output voltage expression of charge pump is derived.
紧接着采用等效电量关系法详细地推导了电荷泵的稳态输出电压表达式。
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