Knowing what your skin looks like will help you recognize any changes.

VOA: special.2010.07.06

As soon as you allow anything to mix, like you might if you want to do any chemistry, entropy changes.

只要你允许物质混合，就像你做任何化学实验的时候要做的，熵就会发生变化。

麻省理工公开课 - 热力学与动力学课程节选

You have a diversity in the chemical changes that occur as a result of any of those connections.

又有多样化的化学变化,这是那些物理连接的产物

耶鲁公开课 - 生物医学工程探索课程节选