He learned all there was To learn about not launching out too soon And so not carrying the tree away clear to the ground.

直到他再没有用武之地，他学会了,所有的花招：不立刻腾身跳出去,免得一下子把树干扳到了地面。

耶鲁公开课 - 现代诗歌课程节选

You could imagine strategies where you have multiple resistance genes on a plasmid, resistance to Ampicillin, to Penicillin, to Erythromycin for example, and you design strategies for separating out which cells are carrying the plasmid that you're interested in.

若质粒上有多种抗性基因,你就有很多筛选方法,例如对氨苄青霉素,青霉素,红霉素的抗性,而且你可以设计方法分离出,含有你感兴趣质粒的细胞

耶鲁公开课 - 生物医学工程探索课程节选