人们的脸上有无拘无束的快乐。
There was unrestrained joy on the faces of the people.
她的婚姻出了问题，她极不快乐。
Her marriage is in trouble and she is desperately unhappy.
尽管他们很快乐，但总缺少点什么。
Happy as they were, there was something missing.
他是一个快乐的不抱怨的旅伴。
He was a cheerful and uncomplaining travel companion.