大批采购比少量购买更经济实惠。
Buying in bulk is more economical than shopping for small quantities.
咖啡会在几个星期内走味，因此最好少量购买。
Coffee goes stale within a couple of weeks so it is best to buy it in small quantities.
新顾客很典型，他们的信息很有限，只能以少量购买或产品评级为基础。
New customers typically have extremely limited information, based on only a few purchases or product ratings.
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