temperamental

形容词 temperamental:

1. relating to or caused by temperament
2. subject to sharply varying moods
   同义词：moody
3. likely to perform unpredictably- Osbert Lancaster
   同义词：erratic

1. A physiological or temperamental peculiarity.
   特异性格一种心理的或脾气上的特异性
2. Nigel is temperamental but he's very highly strung, you know.
   奈杰变化无常，但你知道他是很容易激动的。