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.