These are white blood cells that play a central role in the other major branch of immunity: adaptive immunity.

这些白细胞在免疫的另一个主要分支——适应性免疫中起着核心作用。

You can think of the immune system in two broad terms, innate immunity and adaptive immunity.

你可以从两个广义的术语来思考免疫系统，先天免疫和适应性免疫。