outer-space flight

例句：

1. 1. Theastronauts are planning their nextouter-space flight.
   宇航员们正在计划他们的下一次外太空飞行。
2. 2. Therocket's engineroared as it lifted offfrom the launch pad.
   火箭引擎轰鸣着从发射台升空。
3. 3. The journeyto the moon is one of the mostfamous outer-space flights in history.
   前往月球的旅程是历史上最著名的外太空飞行之一。