Five astronautsastronauts/ˈæstrənɔːts/L1宇航员，在太空工作的人people who travel and work in space live on the International Space Station. They work in space. One day, they had a big problem. There was a small air leakleak/liːk/L1泄漏（气体或液体从孔中跑出）when air or water comes out of a hole in an old part of the station. The leak got worse. So NASA told the astronauts to hide in a spaceship. They were ready to leave fast. After one hour, the dangerdanger/ˈdeɪndʒər/L1危险，可能伤害人的事情something that can hurt you was over. The astronauts went back to work.
The leak is in a tunnel called Zvezda. There are small crackscracks/kræks/L1裂缝，细小的裂口small lines or breaks in something hard in the wall. People can fixfix/fɪks/L1修理，让坏的东西变好to make something that is broken work again them with a special paste. But the cracks come back. Russia and NASA do not agree about the problem. Russia says it is not bad. NASA says it is a big risk. The astronauts felt scared when the leak got worse.
The space station is very old. It will stop working soon. New companies want to build new stations. But it is hard and costs a lot of money. The air leak shows that old things need care. People must work together to keep space safe.
