state that one is suffering from 訴說;訴苦;抱怨
I have nothing to complain of. 我沒有什麼好埋怨的。
Blake is complaining of a headache again. 布萊克說自己又患頭痛病了。
The patient complained of abdominal pain. 病人主訴腹痛。
Workers complain to the boss of their overwork. 因為工作過度,工人向老板訴苦。
The goods complained of were immediately exchanged by the manager. 經理立即把買主抱怨的商品換了。