current per unit of time
单位时间的电流
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Article made a distinction with "time window" in concept and in the current study, the express service is defined as the volume per unit time of transportation and delivery of customer Numbers.
在概念上将快运定义为单位时间的运货量和送货的客户数，与“时间窗”做了区别。
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