He suffered from moodiness. When he was happy he was very, very happy, but when he was gloomy he was morose.他情绪多变,高兴时就高兴得不得了,沮丧时就满脸阴郁。His moodiness may have been caused by his poor health.他的喜怒无常可能是身体欠佳所致。Deep fatigue could drag depression and moodiness in its wake.伴随深度疲劳而来的是心情沮丧和郁郁寡欢。He had learned to live with her moodiness.他学会了忍受她的喜怒无常。Her moodiness makes her hard to get along with.她喜怒无常的个性使人难以与她相处。