guard

• The lunatic was carefully guarded .
  对疯子严加看守。
• It is sometimes a disadvantage to be so very guarded .
  这样提心吊胆，有时候反而不妙。
• And right off i was on guard against mencken's books .
  我马上就对门肯的书警觉起来了。
• They are listed on the closely guarded microfilm .
  它们列于一卷严格保管的缩微胶卷上。
• The guard hairs on either edge alternate with each other .
  两侧的针毛相互交错在一起。
• The same sentiment guarded him from betraying himself .
  同样的情感也阻碍着他说心里话。
• Mark is constantly on his guard .
  马克始终很警惕。
• The criminal has been sent to the county seat under guard .
  这个罪犯已经解到县里去了。
• I 'll mount guard over the luggage while you get the ticket .
  你去买票，我来看管行李。
• Be on your guard against pickpockets .
  提防扒手。