Grok used to be a lesser demon, a plain warrior.

格若克曾经是个弱小的魔鬼, 一介平庸的武夫.

Eventually, the player uses an existing skill to grok another skill.

最终，玩家用已有的技能去获得新技能。

The theory of viral communications is a bit hard for the layman (this writer included) to grok, so I asked Lippman for some examples.

病毒式通信的理论有些深奥，我让Lippman据一些例子。