说明：  从MCS51到AVR的转变,如果你是一个现在懂MCS51，且又想学习其它单片机，对AVR有兴趣的话，这是一本不错的指导书，可以让你快速的从MCS51过渡到AVR系列
(from AVR MCS51 to change, if you are a MCS51 now understand, and indeed want to learn other microcontroller, the AVR is interested in it, this is a good guide book, which will let you quickly from the transition to MCS51 AVR Series)