hot air片语

空话、大话、吹牛贬义

His promises about reform turned out to be just hot air.

他关于改革的承诺到头来只是一堆空话。

热空气、热气

Hot air rises, so the upstairs rooms are always warmer.

热空气会上升，所以楼上的房间总是比较暖。

热气的、热空气的

We took a hot-air balloon ride over the valley at sunrise.

日出时我们乘热气球飞越山谷。