He was in his native element and as happy as a lark.

他兴趣盎然,自得其乐.

英汉文学

He was as happy as a lark.

他非常快乐.

辞典例句

The retort lets person's as happy as a lark affair.

反击是让人很快乐的事情.

互联网

The little girl was as happy as a lark with her new toy.

那小女孩有了件新玩具,简直高兴极了.

互联网