talk hot air 说空话
hot air balloon 热气球
release hot air 释放热气
balloon hot air 热气球空气
hot air rising 热气上升
hot air balloon ride 热气球之旅
hot air inflation 热空气膨胀（比喻）
hot air speech 空洞演讲
1. His promises were just hot air, as he never delivered anything.
他的承诺只是空话，因为他从未兑现任何一项。
2. The hot air balloon slowly rose into the sky at sunrise.
热气球在日出时缓缓升上天空。
3. Don't listen to him; he's just talking hot air about his business plan.
别听他的，他只是在吹嘘他的商业计划。
4. The fan was designed to blow out hot air to cool the room.
风扇的设计目的是吹出热空气来冷却房间。
A: Do you think the company will actually expand this year?
A：你认为公司今年真的会扩张吗？
B: I'm not sure, it sounds like a lot of hot air to me.
B：我不确定，听起来对我来说很多都是空话。
1) 空话，大话
2) 热气球中的加热空气
3) 比喻无价值或无实质内容的言论
4) 热空气（物理现象）
1. 空话；大话；夸夸其谈
2. 热气球中加热的空气
3. （比喻）无价值或无实质内容的言论
e.g.Stop talking hot air and do something real.
别再说空话了，做点实事吧。
noun
1. air that has been heated, especially in a hot-air balloon.
2. (figurative) useless or exaggerated speech; bombast.
Synonym: bombast, bluster