"erratic behavior"
"fickle weather"
"mercurial twists of temperament"
"a quicksilver character, cool and willful at one moment, utterly fragile the next"
"an erratic comet"
"his life followed a wandering course"
"a planetary vagabond"
"erratic winds are the bane of a sailor"
"a temperamental motor; sometimes it would start and sometimes it wouldn't"
"that beautiful but temperamental instrument the flute"
The animal was moving in a curiously erratic path,..making little darts to right or left.
出自: A. C. Clarke