来自《耶鲁大学开放课程：生物医学工程探索第5集第5集》

and cells that are in a bacterium.

和细菌细胞
What are the differences between

人类细胞和细菌细胞
a bacterial cell and a human cell?

有什么不同
What are some of the differences between

人类细胞和细菌细胞
a bacterial cell and a human cell?

有哪些不同之处呢
The bacterium doesn't have a nucleus, and in fact,

细菌没有细胞核
they don't have very well formed organelles in general.

实际上细菌没有完善的细胞器
Human cells have well-described organelles inside of them.

人类细胞中有我们知之甚详的各种细胞器
You took biology in high school,

你们高中学过生物
you learned the names of

学过这些细胞器的名称
these organelles and their principle functions,

和基本功能
the nucleus, the endoplasmic reticulum,

细胞核内质网