The pendulum is usually measured from the top point to the middle of the bob.
摆的长度一般从顶点到摆锤中间来计算。
In a cunning economy, Mr Sauter uses the battery pack itself as the bob of the pendulum.
出于经济眼光, 索特使用电池组本身充当钟摆的浮子。
The mass of the pendulum bob does not change from one location to another on the earths surface.
摆锤的质量在地面各处都一样。
If we want the clock to go faster,we make the pendulum shorter,we call the weight at the bottom the bob.
如果我们想让钟走得快一点，我们就把钟摆弄得短一点。
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