It's easy to know what nucleotide to put in each position as you're going along and polymerizing a new molecule.

这使得复制过程中决定下一个核苷酸位点,应该用哪一个核苷酸更为容易

耶鲁公开课 - 生物医学工程探索课程节选

The second assumption we're going to make which is new is that we're going to assume that candidates cannot choose their position.

我们给出的第二个假设,这个新的假设是,候选人不能选择他们的位置

耶鲁公开课 - 博弈论课程节选