他内心洋溢着幸福感.His heart danced with happiness.他的心情在幸福感与沮丧的两极端间游移((一下心花怒放,一下又变得愁眉苦脸)).His mood oscillates between euphoria and depression.我们有时需要小小的幸福感,以及短暂的幸福.We want bite - sized happiness and short bursts of satisfaction....

“幸福感”的英语可以翻译为：happiness...