In reality, both circle around their mutual center of mass, located between the two.

事实上，两者都围绕着位于两者之间相互心旋转。

These are sets of two stars that orbit around a common center of mass.

即由两颗恒星成，它们围绕一个共同心运行。

The 1.52 meters is how much her center of mass is raised above its landing point.

52 米是她心比着陆点高出多少。

Within a given supercluster, all galaxy motions will be directed inward, toward the center of mass.

而在超星系团内部，所有星系都是向内部心运动。

With a low center of mass, the wheel just swings back and forth like a pendulum, then stops.

当心较低时，车轮就像钟摆一样来回摆动，然后停止。

And yet, collected together, they have a single total amount that they spin about their center of mass.

但聚集在一起时，它们有一个单一总不变量，他们总是围绕着它们心旋转。

The answer is in the center of mass.

答案就是心。

There's a simple way to figure out where the center of mass is.

有一个简单方法找出心。

The center of mass is a pointsomewhere along the plank that holds the two kids where their average weight falls.

心是跷跷板上支撑两个孩子平均重量一个点。

To make the seesaw work, theheavy kid must push that center of mass forward until it just touches the pivot.

要想让跷跷板摇动，重孩子就得往中间挪直到心移到中心。

The stars all orbit the cluster's center of mass, even though there may not be anything at the very center.

所有恒星都围绕着星团心旋转，即使在最中心可能没有任何东西。

Three times heavier and the center of mass will be three times closer. And so on.

重三倍，心位置就进三倍，以此类推。

The moving parts that make one side of the wheel heavier also shift its center of mass downward below the axle.

使车轮一侧更重运动部件也将其心向下移至车轴下方。

In these situations, it’s more useful to describe what the center of mass is doing.

在这些情况下， 描述心在做什么更有用。

A barycentre is the centre of mass between two objects.

重心是两个物体之间心。

This little dot is going to represent the center of mass of that wire.

这个小点将代表那根导线心。

And so you have an inward force towards the planet's center of mass.

所以你有一个朝向地球心内向。

This is about  Newton's Laws, forces, and center of mass.

这涉及牛顿定律、和心。

Put center of mass below center of rotation.

将心置于旋转中心之下。

So you can, for example, re-rank results from distance from a centroid node.

因此，举例来说，你可以根据与心节点距离对结果进行重新排序。