供应链是电商的核心竞争力，没有之一。

The traditional disputes of philosophers are， for the most part， as unwarranted as they are unfruitful.

Inside every large program is a small program struggling to get out.

The successful trader is one who has a plan and sticks to it.

释义：不要遮蔽自己的良心，也不要张扬他人的过错。在与人交往时谨慎行事，就不会有懊恼；在处理事情时耐心商量，就能顺利解决。

柠檬问题是指买家无法确定产品质量，因此只愿意支付反映平均质量的价格。