通过为顾客提供标准化的信封和信盒以及要求标签上标有一致的信息，这些公司建立起一套可靠的跟踪系统。

By providing standard envelopes and boxes to customers and requiring consistent information on the shipping label, these companies were able to build sophisticated tracking systems.

youdao

通过为顾客提供标准化的信封和信盒以及要求标签上标有一致的信息，这些公司建立起一套可靠的跟踪系统。

By providing standard envelopes and boxes to customers and requiring consistent information on the shipping label, these companies were able to build sophisticated tracking systems.

youdao