erratically
adv. 不定地；不规律地
例句
Police stopped him for driving erratically.
警察因其驾驶不循规则而把他拦下了。
《柯林斯英汉双解大词典》
He was obviously upset and was driving erratically.
他显然心烦意乱，开起车来摇晃不定。
《牛津词典》
His formal schooling continued erratically until he reached the age of eleven.
他的正式学校教育断断续续地持续到了他11岁时。
