文章以实验为依据，着重探求了铝镁含量对微晶锌板蚀刻性能的影响。
Based on the experiments, this article emphasizes the influence from aluminum and magnesium content to the etching performance of microcrystalline zinc board.
但在你深入思考牛顿之前，你会认为大部分17世纪以实验为依据的科学家都相信它。
But before you think less of Newton, consider that most experimental scientists of the 17th century believed in it too.
本文以实验为依据，假定起重机的旋转角速度按正弦规律变化，推出货重偏摆角的非线性微分方程。
This paper assumes the rotational angular velocity of a crane according to the experimental sine rule, and derives the nonlinear differential equations of the swing Angle.
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