They are based on levels of damage to twenty-eight different kinds of structures and other objects.

VOA: special.2011.04.19

Let's go back to considering the wavelengths of different objects. We considered a baseball, but let's also think about now an electron.

我们来重新考虑不同物体的波长,我们刚才考虑了棒球，现在来考虑一下电子。

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But it is definitely worth the money. It's just all kinds of different artifacts and objects.

不过钱是花得值得的，那里有各种工艺品和物件。

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But the acceleration is not the same on different objects.

但不同物体产生的加速度是不同的

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It's not as though there aren't important differences between different physical objects.

他们的意思不是不同的物理对象之间,没有什么重大区别

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Now, you can do F = ma for the three different objects.

现在你可以用 F = ma 对这三个物体进行计算

耶鲁公开课 - 基础物理课程节选

But the objects are at different locations at a given time.

但是它们在同一时刻分别在不同的位置

耶鲁公开课 - 基础物理课程节选

So，the point is,every object falling under gravity is given by the same formula, but there are many, many objects that can have many histories, all falling under gravity, and what's different from one object and the other object is, when was it dropped, from what height, and with what initial speed.

关键是,每一个受重力作用下落的物体,都有同样的表达式,但是各个受重力作用下落的物体,都有不同的初始条件,所以它们的区别在于,下落时刻,下落高度和初始速度

耶鲁公开课 - 基础物理课程节选