他们感到快乐的英文怎么说

他们感到快乐的英语是 "They feel happy."

这个短语的来源可以追溯到拉丁语，其中 "feel" 来自 "sentire"，意思是 "感觉"，"happy" 来自 "fepx"，意思是 "幸福的"。

下面是一些英文例句，并提供中文翻译：

"They feel happy after winning the game." (他们在赢得比赛后感到快乐。)
"I could tell they feel happy just by looking at their faces." (我可以从他们的表情看出他们感到快乐。)
"The news made them feel happy and repeved." (这个消息使他们感到快乐和解脱。)