If you do something unhappily, you feel sad and depressed when you do it.
'I don't have your imagination,' Kevin said unhappily.
“我没有你的想像力,”凯文不快地说。
You use unhappily to introduce or refer to a statement when you consider it to be sad and wish that it were different.
On May 23rd, unhappily, the little boy died.
在5月23日,小男孩不幸去世了。
Unhappily the facts do not wholly bear out the theory.
遗憾的是,事实不能完全证实该理论。