当他们走近时，每扇门外都有一名卫兵肃身立正。Outside each door a guard sprang to attention as they approached.全副武装的士兵们立正站着。Soldiers in full combat gear stood at attention.中士立正敬礼。The sergeant stood to attention and saluted....
眼疲劳可不是个玩笑.Eye strain is no joke.?为了减轻眼疲劳, 我们将在公司的每一台计算机上都安装防辐射屏.To reduce eyestrain, we are going to install anti - glare screens on all of the company's computers.检查是否有眼疲劳.Check for eyestrain by putting your hand t...