Astronaut Bursch was chosen to live on the space station crew because he had spent almost three-thousand flight hours in more than thirty-five different aircraft.是什么意思_Astronaut Bursch was chosen to live on the space station crew because he had spent almost three-thousand flight hours in more than thirty-five different aircraft.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句