国务卿卢比奥飞往欧洲的航班因机械故障而折返。 Secretary of State Rubio's flight to Europe turned back due to a mechanical issue.

由于机械问题，载着国务卿卢比奥前往欧洲的飞机不得不折返 The plane carrying Secretary of State Rubio to Europe had to turn back due to a mechanical issue