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笔者在教学实践中对小学科学《做一个钟摆》一课中的实验材料进行了改进,使实验操作变得更加简单方便,现与读者共享。
The author in the teaching practice of primary science “to make a pendulum” a class of experimental materials has been improved, so that the experimental operation has become more simple and convenient, and now share with readers.