And, I'm sure he's not worried about it at all.

而且，我肯，定他一点也不担心。

麻省理工公开课 - 固态化学导论课程节选

Now, I'm not introducing any genetic material at all so I don't have to worry about it replicating because there's no genetic material, all I do is deliver the particles.

这样就根本不用引入任何遗传物质,所以我也不需要担心它会复制,因为根本不存在任何遗传物质了,我所要做的只不过是接种部分微粒

耶鲁公开课 - 生物医学工程探索课程节选