work product rule
工作产品规则
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Additionally, there's a general rule in pricing a product: the higher the price, the harder you'll have to work to acquire a customer for that item.
另外，产品定价有个总的原则：价格越高，越难赢得顾客。
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