on the pig rs back

• 走远；,洋洋得意

on the pig rs back的用法和样例：

例句

1. The boy was flushed with good examination results.
   那男孩因考试成绩优秀而洋洋得意。
2. He walked on air for getting a high mark.
   他因得了高分而洋洋得意。