I am using \'this\' keyword for a long time. But when someone asks me to explain it, I am confused that how to explain it. I know that I can use this in a method of class to access any variable and me
最近正在备孕，但是不知道是啥原因，好几个月过去了我老婆肚子一点动静也没有，我担心有什么问题，就去医院检查了一下，医生给我做了精液常开发者_开发问答规，拿到报告说是精子质量不太行，建议我们做供精人工授精
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