Why is the abacus such an effective teaching device?
为什么算盘有效地帮助了教学？
Time is thus a teaching device, and a means to an end.
因此时间是一种教学设备，是达成目的的一种手段。
A support device for single chip computer teaching experiment is introduced in this paper.
本文介绍了一种用于单片机教学实验的辅助装置。
A support device for single chip computer teaching experiment is introduced in this paper.
本文介绍了一种用于单片机教学实验的辅助装置。
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