a sense of happiness.为什么不用happy

a sense of happiness.为什么不用happy a sense of happiness什么意思 have a happy sense of it 书上是a sense of happiness不能换成feeling吗 a tail of happiness与a happy tail的区别 a sense of piquancy a sound of sense a sense of purpose a sense of humor. a sense of accomplishment all of them look very happy.为什么不用they. A lifetime of happiness