If he is not just prating but sincerely wants to transform to a mass style he must really go among the common people and learn from them otherwise his transformation will remain up in the air .

如果是不但口头上提倡而且自己真想实行大众化的人，那就要实地跟老百姓 去学，否则仍然“化” 不了 的。

Where to go for my holiday is up in the air .

我 到什么地方 去度假还 未定 下来。

His retortion sent the boss to go up in the air .

他的反驳 使老板 怒火 万丈。