n.挥手；起伏
adj.波浪状的
动词wave的现在分词.
After waving her hands casualy,she left. 她随意地挥了挥手就走了。
People were craning out of the windows and waving. 人们把头探出窗外挥手致意。
Bipolar disorder is a chronic and recurrent psychiatric disorder,which is characterized by waving mania or depression. 双相障碍是以起伏性躁狂或抑郁为特征的慢性周期性精神疾病。
