If you could look at these cells you could find differences between them, there are chemical differences in the content of each of these cells.

如果观察这些细胞,你就能发现这些差异,每个细胞内容物的化学成分,都会有一些不同

耶鲁公开课 - 生物医学工程探索课程节选

Because a swimming pool has a lot of chemicals in it.

因为游泳池里添加了很多化学成分。

I like实战 - SpeakingMax英语口语达人

Now, the differences here may be subtle in terms of chemical composition or if you put these cells under a microscope and looked at their analysis.

干细胞与祖细胞化学成分的区别,还非常微小,除非你把细胞放在显微镜下,或者看细胞分析报告

耶鲁公开课 - 生物医学工程探索课程节选

Because there are a lot more chemical-sounding things in that list of ingredients than there are things that nature would recognize or we would ordinarily recognize as food.

因为配料单里的很多东西,看上去更像化学成分,而不是我们通常认为的自然物质,或者常规意义上的食物

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选