blending: “smooth bleeding”
"We’ve done a lot to improve performance and consistency in Node streams, but there’s something uniquely powerful about starting from scratch. New streams’ approach embraces modern runtime realities without legacy baggage, and that opens the door to a simpler, performant and more coherent streams model."，这一点在safew官方下载中也有详细论述
他深入调研，反复思量：“什么是‘好县’？”，更多细节参见同城约会
exchanged = 0; // 发生了交换