In these cases, the muscle fibers don't change in length, but instead keep the muscles rigid.

在这些情况之下，肌肉纤维的长度保持不变，而整个肌肉处于一种僵硬的状态。

And strain is the object’s change in length, divided by its original length.

应变是物体的长度变化除以其原始长度。

And strain is the object's change in length, divided by its original length.

情绪是变化的产物 纵向元素，在其原始长度。

The only other thing that the change in length depends on is that coefficient of linear expansion, represented by the Greek letter alpha.

唯一的其他变化取决于 长度是线性膨胀的程度，用 alpha 表示。

The only differences are that the original length, area, and change in length represent different parts of the object, and that we use a different modulus.

唯一的区别是原始长度、面积和长度的变化代表物体的不同部分，并且我们使用了不同的模数。

Shortening of the fleshy part of the muscle produces movement at the joint by pulling on the tendon. The tendon itself does not change in length.

肌肉肌腹缩短可通过拉动肌腱使关节运动。肌腱本身的长度并没有变化。

And the equation that we use to describe linear expansion, says that the change in length is equal to what's known as the coefficient of linear expansion

以及我们用来描述线性膨胀的方程 就是长度的变化等于线膨胀的程度。

These changes in length and volume work in a very similar way to the changes in length and volume from stress and strain, that we talked about in our episode on statics.

长度和体积的变化类似 从张力和压力改变长度和声音。