Many countries now make rockets that can come back to Earth. The USA, China, India, and Europe all have different ways to do this.

許多國家現在都在製造可以返回地球的火箭。美國、中國、印度和歐洲各有不同的實現方式。

The USA uses engines to land rockets slowly on the ground or sea. China also uses engines, but they use a big net to catch the rocket on a ship.

美國使用引擎讓火箭緩慢降落在地面或海面上。中國同樣使用引擎，但他們使用巨大的網在船上捕捉火箭。

India makes a rocket that looks like a plane. It does not use engines to land. It glides through the air and lands on a runway.

印度製造了一款外形像飛機的火箭。它不使用引擎降落，而是透過在空中滑翔後降落在跑道上。

Europe wants a different way. They want a plane to catch the rocket in the air. This way is very efficient and saves weight.

歐洲則希望採取不同的方式。他們想利用飛機在空中捕捉火箭。這種方式非常高效且能減輕重量。

Some countries want rockets that carry a lot of things. Other countries want rockets that are cheap and efficient.

有些國家想要能承載大量物資的火箭，而有些國家則追求廉價且高效的火箭。