So, it's a cool finding of that stage, suggesting a limitation in how you deal and make sense of the world.

这是该阶段的一个重要发现,表明儿童在考虑和理解世界的方式上,存在着局限性

耶鲁公开课 - 心理学导论课程节选

So you need first to take the liquid helium and cool it below 53 degrees Kelvin before you can do the Joule-Thomson to cool it even further to make liquid helium.

我们首先需要,把温度江都53k一下,然后利用焦耳-汤姆孙实验,来继续冷却它。

麻省理工公开课 - 热力学与动力学课程节选