We want to set up an experiment

我们要设计一个实验
where we can apply a force uniformly

实验中我们可以均匀施力
and measure the result of that force simply.

并简单测量施力的结果
The experiment I show here is just to hang a weight on that material

这个实验中我只是在该材料上挂上个砝码
that's suspended from the ceiling, that rubber band, for example.

比如这个从天花板悬挂下来的橡皮筋
I hang a weight on it, and so that weight applies some force to the material

我在皮筋上挂个砝码砝码给材料施力
because gravity is going to pull it down

由于重力作用所产生的向下拉力
with some force based on its mass.

拉力大小取决于砝码的质量
For most materials, certainly for rubber bands,

对于大多数材料来说当然也包括皮筋
if I put them on the--affix them to the ceiling that way

如果我把它们粘在天花板上
and attach the weight, what would happen?

并挂上砝码会发生什么呢
They would lengthen; they'd get longer

它们会被拉长它们会变得更长