adj.古怪的；飘忽不定的；不稳定的

He was like a stormy, erratic boy. 他好象是个性急的古怪的孩子。

Though occasionally chatty, his moods were erratic. 他虽然有时健谈，但是他的脾气却很难捉摸。

An erratic mind jump from one idea to another. 心意不定的人反复无常。

They no longer fear the erratic behavior of the market. 他们永远不害怕市场飘忽不定的行为。

Deliveries of goods are erratic. 不按规定送货。

adv.不规律地；不定地；飘忽不定地，不稳定地