第一篇附录介绍了教育版 Mindstorms 套件与零售版之间的差别，我认为这篇附录不是非常有用的。
The first appendix describes the differences between the educational Mindstorms set and the retail version, and I don't think this appendix is very useful.
无线电侧向设备、教学训练比赛的电子套件等批发、零售、代购代销。
We also engage ourselves in wholesales, retailing, purchase and consignment for electronic-sets as radio direction finders and course wares.
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