happy; joyful; festival; gay; gladsome; joyous; merry; pleasurable

1. 他邊走邊用口哨吹著快樂的曲子。
   He whistled a happy tune as he walked along.
2. 沒能上大學焉知非福，我想你在大學里是不會覺得快樂的。
   Not getting into university may be a blessing in disguise; I don't think you'd have been happy there.
3. 斜線號一種斜線符號，尤用于對選擇加以區(qū)分，如和／或者，表示每 ... 這一詞，如英里／小時，和在詩尾表示連續(xù)打印行，如老國王考勒／是?em>桓隹燉值睦先?
   A diagonal mark(/) used especially to separate alternatives, as in and/or, to represent the word per, as in miles/hour, and to indicate the ends of verse lines printed continuously, as in Old King Cole/Was a merry old soul.
4. 我可以向你保證，你兒子在這里會很快樂的。
   I can assure you that your son will be happy here.

快樂的英語翻譯：