Natural experiments can provide valuable insights into economic questions.
如果你借给别人 20 美元,而他为了不还钱选择不再见你,那你们的关系就只值 20 美元。
我的粉丝是我的动力。
永不放弃。
Innovation is not just about technology; it's about changing mindsets and creating value for everyone involved in the fruit supply chain.