claims, promises or statements that sound impressive but have no real meaning or truth 夸夸其谈；大话；空话 He talks a lot of hot air. 他说很多话。 Don’t worry about what they’re saying—it’s all hot air. 不用担心他们在说什么-都是热空气。 The whole debate was just so much hot air. 整个辩论是如此热烈。