知道每个物体的重量是个好主意。
月光下,我只能分辨出物体的轮廓。
By the light of the moon I could just make out shapes and outlines.
有夜视功能的摄像机能被物体的活动激活。
Video cameras with night vision can be activated by movement.
每个生物体的生命周期都极其独特。
Every organism has a life span which is highly characteristic.
记住,DNA是任何生物体的遗传密码。
此外,颜色影响着一件物体的外观。
因此我们升高一物体的温度。
我做一些预测,关于两个物体的速度。
And so I will make some predictions about the speed of these two objects.
因此,可以通过密度求一个平面物体的质量。
让物体的中心,比方说,在这里。
细胞的疲倦成就了生物体的活力。
现在,这里是,物体的矢量中心。
And this, now, is the position vector of the center of mass.
它是在一个物体的表面拍照。
这是科学第一次阻止了生物体的痛苦。
This was the first time science throttled the throes of any organism.
液态水是构成生物体的关键。
但是,测量这些物体的速度和距离又是很困难的。
But, again, measuring the speed and distance to these objects is difficult.
物体的重量减少。
所以物体的重心,经常处于悬挂点之下。
So the center of mass will always find itself below the point of suspension.
现在我知道,放开,物体的时候,速度为。
Now, I know that I release it at 0 zero speed, so this is zero.
一个平面物体的密度是每单位面积元的质量。
The density for a flat object would be the mass per unit area.
纵轴就是物体的路径。
这和物体的重量无关。
物体的中心在这里。
也可以这么说,“它和物体的质量,成正比。”
And we could have said, "Yeah, it's probably proportional to the mass somehow."
因此,他们可能患有视觉失认症,从而失去识别物体的能力。
And so, they may get visual agnosia and lose the ability to recognize objects.
但你们可能也在物理学中见过了,就是求一个给定物体的重心?
But one that you might have seen in physics, we care about maybe where is the center of mass of a given object?
答:这个则属于物理学和对重返地球物体的了解方面的问题了。
A: It's a matter of physics and knowing the reentering object.
这个则属于物理学和对重返地球物体的了解方面的问题了。
如果有两个物体的温度相同,又有另外两个物体的温度相同,那么这三个物体一定有同样的温度。
If two object are in the same temperature, and two other object are in the same temperature, then all three must have the same temperature.
如果有两个物体的温度相同,又有另外两个物体的温度相同,那么这三个物体一定有同样的温度。
If two object are in the same temperature, and two other object are in the same temperature, then all three must have the same temperature.
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