Cells can stop in their lifetime at some point in the cell cycle and persist for long periods of time.

细胞生命期可以停止在细胞周期的某个点,并保持很长时间

耶鲁公开课 - 生物医学工程探索课程节选

So, one that perhaps does not reproduce in such high numbers that you create an overwhelming infection, but one that still goes through its lifecycle but is limited in its effect.

因此,一方面这些病毒不会大量复制,从而不会导致暴发性的感染,另一方面,它依旧在进行生命周期循环,只不过对其效用进行了限制

耶鲁公开课 - 生物医学工程探索课程节选

It turns out in the case of Hepatitis B, the way the lifecycle proceeds-- the cells make too much of the protein and not all of it gets assembled into the virus.

结果显示,在乙肝的病案中,病毒生命周期的发展情况,细胞制造了大量的蛋白质,但并不是所有的蛋白质都会组合成病毒

耶鲁公开课 - 生物医学工程探索课程节选

They are RNA molecules but they have at some points in their life span, they have amino acids attached to them.

这些是如假包换的RNA分子,但在其生命周期的特定时间,它们会携带一个氨基酸分子

耶鲁公开课 - 生物医学工程探索课程节选