The balance of these two forces can keep a satellite in orbit for many years!

这两种力的平衡可以使卫星轨道上运行多年！

However, Lagrange points are places where all these forces balance out.

但是，拉格朗日点是所有这力平衡的地方。

However, now you can see an imbalance of forces.

然而，现你可以看到力的不平衡。

As firefighters hosed down the Cathedral, some stones gained almost a third of their weight in water-- further changing the balance of forces between the vaults and wall.

当消防员用水管冲洗大教堂，石头水中的重量增加了近三分之——进步改变了拱顶和墙壁之间的力平衡。

An object in motion can stay in motion, as long it is being acted on either by a balanced force, or (i guess) a set of forces that balance each other, or no forces at all.

运动中的物体, 只要它不受力或所受的力是平衡力或组相互平衡的力, 它将保持运动状态.