The first song was already starting and the music was as loud a jet engine.
这首歌已经开始和音乐是响亮的喷气发动机。
This is the important research problem for starting of the jet engine in the sky. But it was researched for starting test of the small turbojet in the sky.
喷气发动机的空中起动是重要的研究课题，而小涡喷发动机的空中起动试验尚需探索。
The first song was already starting and the music was as loud a jet engine.
第一首歌曾经开端了，而那音乐就像喷气发起机一样响。
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