VOA慢速英语:NASA Astronauts Train for Commercial Space Flights

shuttle – n. a vehicle that travels back and forth between places

spacecraft – n. a vehicle that is used for travel in outer space

simulators – n. machines that are used to show what something looks or feels like and are usually used to study something or to train people

cockpit – n. the area in a boat, airplane or spacecraft where the pilot or driver sits

mission – n. an important operation or program