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. 我安装火箭已有两年之久了。 2.We also give prizes for the best built rocket. 我们也给设计最好的火箭颁奖。 3.If your rocket goes the highest, you win. 如果你的火箭飞得最高,你就胜出。 4.I built one of my rockets myself. 我制作了我许多火箭中的一个。