So if it's not a cell that's going through division you can't use a retrovirus to express the protein.

如果细胞不在分裂阶段,你就不能用逆转录病毒来表达某个蛋白

耶鲁公开课 - 生物医学工程探索课程节选

Nevertheless, without the retrovirus's presence now, you might not have been born.

ECONOMIST: A virus has been subverted into helping its host

This dual life-cycle means that, besides disrupting normal cellular activities in the ways that other viruses do, a retrovirus may also disrupt the normal function of its host's chromosomes.

ECONOMIST: Foulpox