adj.古怪的；飄忽不定的；不穩(wěn)定的

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

Though occasionally chatty, his moods were erratic. 他雖然有時健談，但是他的脾氣卻很難捉摸。

An erratic mind jump from one idea to another. 心意不定的人反復(fù)無常。

They no longer fear the erratic behavior of the market. 他們永遠(yuǎn)不害怕市場飄忽不定的行為。

Deliveries of goods are erratic. 不按規(guī)定送貨。

adv.不規(guī)律地；不定地；飄忽不定地，不穩(wěn)定地