careful

• Mary : be careful ! do not drop it !
  玛丽：小心点，别摔了！
• Be careful he doesn't double-cross you .
  当心别让他出卖你。
• Careful observation of the infusion site is necessary .
  必须仔细观察输液部位。
• He had sufficient experence to make him careful .
  他的丰富的经验使他谨慎从事。
• Anna was careful to appear unaware of it .
  安娜小心翼翼地装出不知道那事的样子。
• You should give it careful reconsideration .
  你应该仔细地重新考虑一下这个问题。
• Be careful what you say ; even the walls have ears !
  当心你说的话，隔墙有耳啊！
• This effect can be minimized by careful design .
  精心的设计可使这效应减至最小。
• Be careful not to infringe the rights of other people .
  当心不要侵犯别人的权利。
• Teaching methods need careful study .
  教学方法大有讲究。