er·rat·i·cal·ly
adverb/ɪˈrætɪkli/
/ɪˈrætɪkli/
(often disapproving)- not in a regular way; in a way that does not follow any plan or regular pattern and that you cannot rely on
不规则的；不确定的；不稳定的；不可靠的 - He was obviously upset and was driving erratically.
他显然心烦意乱，开起车来摇晃不定。 - His heart beat erratically.
他的心跳不规律。
- He was obviously upset and was driving erratically.