And pure substances, because they don't have concentrations, aren't included in equilibrium calculations.

这就是为什么水既可以显酸性也可以显碱性。

So the fact that we experience the flow of time right now means that we're not in equilibrium.

所以我们现在经历的时间流意味着我们不是处于平衡状态。

While it’s lying there, at rest, it’s in equilibrium.

当它躺在那里， 静止时，它处于平衡状态。

27. Until an external force acts, the system remains in equilibrium.

27. 在外力作用之前，系统保持平衡。

The ladder isn’t accelerating -- or even moving -- so it must be in equilibrium.

梯子没有加速——甚至没有移动——所以它一定处于平衡状态。

When you have an empty soda can, the air pressure on the inside and the air pressure outside are in equilibrium.

当你有一个空的易拉罐时，里面和外面的气压是平衡的。

Torque affects equilibrium too, since an object in equilibrium, can't have rotational acceleration, either.

扭矩也会影响平衡，因为没有 平衡元件可以具有角加速度。

Torque affects equilibrium too, since an object in equilibrium, can’t have rotational acceleration, either.

扭矩也会影响平衡， 因为处于平衡状态的物体也不会有旋转加速度。

The ladder isn't accelerating -- or even moving -- so it must be in equilibrium.

梯子没有加速甚至移动， 所以它肯定处于平衡状态。

In the moments just after the Big Bang, all three components are in equilibrium, meaning no one location is denser than another.

在大爆炸之后的瞬间，这三个部分都处于平衡状态，这意味着没有一个地方比另一个地方密度大。

Named after the 18th century mathematician who deduced their positions, Lagrange points are rare places of equilibrium in our constantly shifting universe.

拉格朗日点是以推导出其位置的 18 世纪数学家拉格朗日的名字命名的，拉格朗日点是我们不断变化的宇宙中罕见的平衡点。

So again, there can be torques on an object in equilibrium, but there can't be NET torques on it.

所以再一次，旋转力可以应用于 元素，但其总和必须为零。

I had not then understood that, in certain conditions, the system could be in equilibrium with less than full employment.

那时我还不明白，在某些情况下，系统可能会在未充分就业的情况下达到平衡。

While it's lying there, at rest, it's in equilibrium.

当他还在那里时，他处于平衡状态。

So again, there can be torques on an object in equilibrium, but there can’t be NET torques on it.

同样，平衡物体上可能有扭矩， 但不能有 NET 扭矩。

When the water boils and you have steam, the steam on the inside is still in equilibrium with the air pressure on the outside.

当水沸腾时有蒸汽，里面的蒸汽和外面的气压保持平衡。

An object that's in equilibrium can still be MOVING, like the sliding puck, but its VELOCITY won't be changing.

处于平衡状态的东西可以移动， 就像一个滑动的磁盘，但它的速度不会改变。

So, once you know that an object's in equilibrium, you can use that fact to find the forces and torques acting on it.

所以当你知道元素是平衡的，你可以 那是从影响它的力和力矩的计算中得出的。

So, once you know that an object’s in equilibrium, you can use that fact to find the forces and torques acting on it.

因此，一旦您知道一个物体处于平衡状态， 您就可以使用该事实来找出作用在该物体上的力和扭矩。

All of this means that for an object to be in equilibrium, all the forces AND torques on it have to balance out.

这一切意味着，为了使一个元素平衡，它必须 所有的力和扭矩都必须平衡。