一定要的英文：
must

• We must completely change the current status of overstaffed organizations and superfluous staff.
  我们一定要彻底改变这种机构臃肿、人浮于事的现况。
• Your prescription is ready. Be sure to take them after meals.
  你的药配好了。一定要饭后服用。
• One main idea possessed her; she must get away from home.
  她只有一个想法;她一定要离家出走。
• In order to oppose imperialist aggression,we must build a powerful navy.
  为了反帝国主义侵略，我们一定要建立强大的海军。
• I really dont see why you should keep a diary at all
  我真不明白你为什么一定要保留一本日记。
• She exacted an apology from the tradesman for having questioned her honesty.
  她一定要那个商人向她道歉，因为他怀疑她偷东西。
• Always proofread completed letters very carefully.Consult dictionary when necessary or in doubt.
  完成的书信一定要很小心地校对，有必要或怀疑时查典。
• We must build a centralized, unified Party and make a clean sweep of all unprincipled factional struggles
  我们一定要建设一个集中的统一的党，一切无原则的派别斗争，都要清
• Set aside a day for the mustsee spectacle of Milford Sound in the heart of NZs unspoiled and aweinspiring fjordland
  一定要留一天给不能错过的美景米尔福德峡湾,它位于新西兰腹地纯自然而壮观的峡湾地区。
• Make sure you get there in time.
  一定要准时到达那里。

• We must act, we must act quickly.
  我们必须行动，立即行动。
• You must synthesise various opinions.
  你必须综合各方面的意见。
• You must not relax your efforts.
  你不可以松懈你的努力。
• You must keep calm in an emergency.
  在紧急关头要保持镇静。
• You must give way to betters.
  你必须让长者先行。