He felt unhappy because he didn't pass the exam. 他考试不及格，所以很不开心。
The unhappy couple are separated by the wall. 这对不开心的夫妻被一堵墙分隔开了。
It does no good for you to repine at your unhappy lot.
你埋怨自己命苦是没有用的。
We are unhappy at the way the press has treated this incident.
我们对新闻界这样对待这件事感到不满。
※All happy families are like one another; each unhappy family is unhappy in its own way.——Leo Tolstoy ,Russian writer 所有幸福的家庭都十分相似；而每个不幸的家庭各有各自的不幸。俄国文学家 托尔斯泰.L.
