Because the cells are the fundamental component of our bodies; very interesting because all of our cells in our body share many characteristics and some of those characteristics are shown on this picture.

因为细胞是我们身体的基本构成单位,这非常有意思,因为我们身体里所有细胞,有许多共同的特征,而其中的一些特征展示在了这幅图中

耶鲁公开课 - 生物医学工程探索课程节选

Have you had a professor with very special characteristics?

你的教授中有没有个性非常突出的呢？

有印象的教授 - SpeakingMax英语口语达人

They have not evolved to tolerate some of the man made sounds that have very unusual and unnatural physical characteristics. These sounds are for example explosives, industrial noise, musical instruments, power tools, and headphones.

还没有进化到能忍受,某些怪异，超出常规的人为声响,如爆炸，工业噪音,乐器，电动工具和耳机等等。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

So, for example, when people, and we'll talk about this next class, were looking at different characteristics spectra of different atoms, what they were seeing is that it appeared to be these very discreet lines that were allowed or not allowed for the different atoms to emit, but they had no way to explain this using classical physics.

举个例子，当大家看到,不同原子的特征光谱时,他们看到的是一些分离的线,那可以使不同的原子,发射或不发射出去，但是这些无法用经典物理来解释。

麻省理工公开课 - 化学原理课程节选