1. 不 用 谢 and 不 客 气 are the same meaning ? i think 不 用 谢 and 不 客 气 are the same meaning. 2. 想 睡 and 上 床 了 = time for bed Are they different ? yes ,想 睡 and 上 床 了 are different,想 睡 means someone feel like sleep,but 上 床 了means someone has sleeped on the bed . 3. 很 乖 = ? What is the meaning ? it mesns someone do something is good and make you feel good. 4. 普 通 话 and 汉 语 = Chinese language Can we use in the same meaning ? in my opinion, 普 通 话 and 汉 语 can't use in the same meaning, 汉 语 includes 普 通 话. 5. 呼 气 = to breathe out but in the web = breathe in 6. 气 = to breathe in , ......., = breathe out 呼 气,吐气， i think they are the same