This brings us to another way of defining a species; namely, the biological species concept.

这给我们带来了另一种定义物种的方法；即生物物种概念。

The biological species concept defines a species as the group of organisms which can interbreed.

生物物种概念将物种定义为可以杂交的生物群。

The biological species concept makes sure that cryptic species, those that look similar but do not interbreed, are separated.

生物物种概念确保将那些看起来相似但不杂交的隐匿物种分开。