A different question is, there in that experiment the "groupiness" was established in a very powerful way.

还有一个问题就是，在这个实验里,这种群体性是通过一种很有力的方法形成的。

耶鲁公开课 - 心理学导论课程节选

Synthesis always occurs in one direction and that makes sense to you now because you know there's a directionality and the chemistry is different going one way than the other and this DNA polymerase only works on the chemistry going in one direction.

NA复制过程是单向的,现在你们该明白原因了,因为DNA单链有方向性,DNA在两个方向上化学性质不同,DNA聚合酶,只在一个方向上起作用

耶鲁公开课 - 生物医学工程探索课程节选