The human mind responds to stimuli, through which it may be "keyed up" to high rates of vibration, known as enthusiasm, creative imagination, intense desire, etc.

人心对刺激会产生反应，受到刺激，人心会激发高度的共振，并化之为热心、创造性的想象力、强烈渴望等等。

youdao

Clearly, the only logical thing to do is to keep that "3D will never take off" comment macro keyed up, it will be getting a lot of use over the next few months.

ENGADGET: Three for 3D: ESPN 3D adds Home Run Derby, Sky 3D launches 4/3, AcTVila makes the jump this summer

Keyed up by that, Mr Harrer longed to be picked for a Himalayan expedition.

ECONOMIST: Heinrich Harrer

It's got a lot in common with the repetitious, keyed up music you hear in trendy dance clubs, and that just might be the way this trance-inducing sound finds a worldwide audience.

NPR: Hearing African Roots in Konono's Music