扩阶系统
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system of expanded order
扩展订单制
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Walmart already offers in-store pick up and just expanded its test of a locker system where shoppers can order online and pick-up in the store without waiting in line.
FORBES: Walmart Vs. Amazon: It's About To Get Interesting
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