假如有一天，科学家收到到外星人发来的信号该怎么办呢？我们有建造飞碟起落跑道来欢迎它们吗？

Suppose one day scientists pick up a transmission they think is generated by aliens. Now what? Do we build a landing strip and break out the welcome wagon?

youdao

杰克听到发动机悲鸣着尽量让飞机滞空，突然声音消失了，轮胎重重落在跑道上，巨大的冲击力令起落架不堪重负。

Jack heard the engines straining to keep the aircraft aloft. Then they cut out and the wheels slammed onto the runway, too hard for the landing gear to support the impact.

youdao

这个机场的跑道正在扩建以适应大型飞机起落。

Therunway of this airport is undergoing expansion to accommodate large planes.

youdao