This speeded up the spacecraft to reach Earth nine hours sooner.

VOA: special.2009.07.22

Another value for community learning we set up to have office hours, synchronized office hours, with the students and the professor.

学习社群的另一个价值,在于给学生和教授，制定办公时间，有规律的办公时间。

麻省理工公开课 - 媒体、教育、市场课程节选

where you show up about 2 hours before the show,

演出开场前两小时你到场，

实惠的歌舞剧 - SpeakingMax英语口语达人

The situation became fraught, and in the hours leading up to the family vote Mr. Cox Jr. was briefly admitted to a hospital in Massachusetts for diabetic shock.

WSJ: William Cox, Dow Jones Executive, Dies at 82

At Bar e Lanchonete dos Esportes, a bar on the street outside the stadium, English and Brazilian fans posed for photos and fraternized together in the hours leading up to the game.

WSJ: Brazil 2, England 2: Brazil's Maracan? Stadium, National Team Need Work

Asked about reports the couple had been arguing in the hours leading up to the crash, the police said they were treating the incident as a traffic accident, not a domestic issue.

BBC: Golfer Tiger Woods delays police questions over crash