If you complain about a situation, you say that you are not satisfied with it.
例句
Miners have complained bitterly that the government did not fulfill their promises...礦工們憤憤不平地抱怨說政府沒有履行諾言。The American couple complained about the high cost of visiting Europe...這對美國夫婦抱怨到歐洲旅行的花銷太高。
VERB
訴說有…病痛;主訴
If you complain of pain or illness, you say that you are feeling pain or feeling ill.