One way is to allow these bacteria to grow on a plate that is loaded with antibiotics like Ampicillin.

一种方法,是让这些细菌,在有大量抗生素如氨苄青霉素,的培养基上生长

耶鲁公开课 - 生物医学工程探索课程节选

That's shown in this diagram as little colonies of bacteria that are growing on a plate.

图示上显示的是生长在培养基上的,一些菌落

耶鲁公开课 - 生物医学工程探索课程节选

If this plate has Ampicillin in it, then the only cells that would be able to grow here are cells that have resistance to Ampicillin.

如果培养基上有氨苄青霉素,那么能在这里生长的,只有那些对氨苄青霉素有抗性的细胞

耶鲁公开课 - 生物医学工程探索课程节选

You've probably seen agar plates, if you smear a solution that's contaminated with bacteria on it, then that bacteria will grow on this agar rich medium and you'll get many, many copies of the bacteria that you've smeared at low density onto the plate.

你们大概见过琼脂培养基,如果将有细菌的溶液涂抹在培养基上,细菌就会在富含琼脂的培养基上生长,你会得到许多许多细菌,即使你只涂抹了低浓度溶液

耶鲁公开课 - 生物医学工程探索课程节选