It means that a successful mutated line of rotifers will not be diluted by the genetic mixing caused by sexual congress.

这意味着一个成功的轮虫突变系不会被有性繁殖引起的基因混合所稀释。

Of you having sexual congress with this woman.

一点也不会增加你和这个女人性交的几率。

She looked upon what you delicately call sexual congress as a natural function of the body like any other.

她把你巧妙地称之为性大会的东西看作是身体的一种自然功能， 就像其他任何东西一样。