exchanged = 0; // 发生了交换
从产业趋势看：租赁只是过渡，不是终局站在更宏观的角度看，机器人租赁的出现，是技术成本下降与市场认知上升之间的过渡形态。
，这一点在同城约会中也有详细论述
Calamine lotion can be used to help relieve the itchiness of chickenpox spots
We’ve all had that sinking feeling. There are multiple crash reports from production. We have the exact input parameters that caused the failures. We have the stack traces. Yet, when we run the code locally, it works perfectly.