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n. 切口;截口;劈痕
n. 甲府市(日本本州岛中南部城市)
K.F.Group International Inc
For so many of us, the presidency of J.F.K.
VOA : special.2009.08.16
It will typically look like this and the formula we say is F = - kx, where k is called "The force constant."
图像看上去一般就像这样,对应的式子是 F = - kx,k 叫做"弹性系数"
基础物理课程节选 : 耶鲁公开课
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