not even or regular in pattern or movement; unpredictable 不稳定的;捉摸不定的;无规律的 her breathing was erratic. 她呼吸不均匀。
noun
(亦作 erratic block 或 boulder)(Geology)a rock or boulder that differs from the surrounding rock and is believed to have been brought from a distance by glacial action (地质)漂块,漂砾
派生 erratically adverb erraticism noun 语源
late Middle English: from Old French erratique, from Latin erraticus, from errare 'to stray, err'