When they bind, they produce some change in the receptor molecule which is experienced inside the cell.

当它们结合后,会使受体分子发生改变,这个过程发生在细胞内部

耶鲁公开课 - 生物医学工程探索课程节选

You first separated your DNA, let the primers bind, then turn on the enzyme, and it makes copies of each one of these.

首先解旋DNA双链,使引物结合,接着激活聚合酶,最终得到各链的复制产物

耶鲁公开课 - 生物医学工程探索课程节选