Remember that these cells are relatively large compared to bacteria and so diffusion doesn't occur very quickly over this length scale.

要知道这些细胞相对细菌而言,还是比较大的,扩散作用在这种尺度上,发生得不是那么快

耶鲁公开课 - 生物医学工程探索课程节选

This is a bacterium that's normally present in humans; it colonizes all of our intestinal systems.

这种细菌在人体中很常见,栖居在我们所有人的肠道系统中

耶鲁公开课 - 生物医学工程探索课程节选

Won't help me against other bacteria, but only against the one that I've got.

但对其他细菌却不起作用,只能抵抗我感染到的这种细菌

耶鲁公开课 - 生物医学工程探索课程节选