That approach requires a large number of troops to provide security and help the local government assert its authority and deliver services.

VOA: standard.2009.10.01

That way you could deliver a small number of vectors and they could amplify into a large number of vectors.

这样你只需向细胞中转入少量载体,就能得到大量的拷贝

耶鲁公开课 - 生物医学工程探索课程节选