问题描述：
英语翻译
1.I' ve been launching rockets for two years.
2.We also give prizes for the best built rocket.
3.If your rocket goes the highest,you win.
4.I built one of my rockets myself.
1.I' ve been launching rockets for two years.
2.We also give prizes for the best built rocket.
3.If your rocket goes the highest,you win.
4.I built one of my rockets myself.
问题解答：
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