时

• Joe was in college and worried about exams .
  乔在大学读书时发愁考试。
• He has diffidence in expressing his opinions .
  他表达意见时缺乏自信。
• She had lost in the finals the week before .
  她在上周决赛时被击败了。
• The troops fanned out as they advanced .
  部队向前推进时呈扇形散开。
• He dodged when the police fired at him .
  警察向他开枪时，他躲开了。
• He summed up the situation at a glance .
  他一眼就看清了当时的情况。
• He realized at once what was happening .
  他一眼就看清了当时的情况。
• The anastomosis must be done with great care .
  吻合时必须格外小心。
• The campaign did not detain him long .
  竞选时的问题并没有缠住他多久。
• It was ten o'clock when he finally showed up .
  十点钟时他终于出现了。