2.shuttle a scientific payload to an orbiting space station.
用航天机将科学装备送往轨间站
3.Let's pretend we're on the spaceship orbiting round the earth!
让我们假装是在沿轨绕地球运转的船上!
4.The orbiting Discovery crew on the way Sunday to rewire the International Space Station first had to make sure the shuttle's heat shield(heatshield) wasn't damaged during lift-off.