1·They developed a solar airplane.
他们开发了一种太阳能飞机。
2·Did Sunee's package travel by airplane?
苏尼的包裹是通过飞机运输的吗?
3·The new airplane flies twice the speed of sound.
这架新飞机的飞行速度是音速的两倍。
4·We watched the airplane ascend higher and higher.
我们看着飞机越飞越高。
5·The invention of the airplane has changed our lives.
飞机的发明改变了我们的生活。