I want to learn harmonica. But how many keys are these in total? And which key is suitable for beginners?
我想学口琴只是不知道，十孔的口琴有没有不同的调子，初学者买什么调的好？
Recently wrote a simple chat room procedures, suitable for beginners to learn, because I have limited, if there is nothing wrong with the place, but also called upon to criticism.
近日写了个简单的聊天室程序，适合初学者学习，由于本人水平有限，如果有什么不妥的地方，还请各位批评指正。
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