walking in the air空中漫步

1.We' re floating in the moonlit sky
  float v.漂浮, 浮现, 飘动,提出
  例如：
    1.The logs floated down the river.
      木头在河上放流。
    2.Idle thoughts floated through his mind.
      莫名其妙地想法浮现在他心头。
    3.White clouds float over the blue sky.
      蓝蓝的天上漂浮着朵朵白云。
2.The people far below are sleeping as we fly
  as  在这里的意思时：当…时
3.We' re holding very tight
  hold  v.拿着, 控制, 容纳, 握住, 持有, 保持, 掌握, 认为, 举行
  例如：
    1.My new car holds the road well.
      我的新汽车贴路性能很好。
    2.I don't think the car will hold you all.
      我看这辆汽车坐不下你们这些人。
    3.We held our breath in fear.
      我们因害怕而屏住呼吸。
4.The villages go by like dreams
  go by (时间)过去, 经过, 走过, 依照
  例如：
    1.He can drive his car to work or go by bus.
      他可以自己驾车上班或乘公车。
    2.He let a week go by before answering the letter.
      他一周以后才回信。
5.We' re surfing in the air
  surf  v. 冲浪, 浏览 
  例如：
    1.The surf broke on the rocks.
      迎头浪冲上岩石四下迸溅。
    2.If the waves are big enough, we'll go surfing.
      如果浪够大的话，我们就去冲浪。
6.We' re drifting over icy mountains floating by
  drift 漂流, 漂移, 吹积, 漂泊, 偏离 
  例如： 
    1.She finally drifted in two hours after everyone else.
      在大家到齐之後两小时，她终於姗姗来到。
    2.A tiny fishing boat was drifting slowly along.
      一只小小的渔船在缓缓地漂去。
    3.The road was edged with snow drifts.
      路边上有一个个雪堆。