tread on air

• vi. 洋洋得意(飘飘然)

tread on air的用法和样例：

例句

用作不及物动词 (vi.)

1. He walked on air for getting a high mark.
   他因得了高分而洋洋得意。
2. Anatole with his swaggering air came up to the window.
   阿纳托利现出洋洋得意的神气，向窗前走去。