需要有

• This year has been frantically busy for us -- i need a holiday just to wind down .
  今年我们忙得要命我需要有一段假期放松一下。
• The least self-conscious of styles should require the most self-conscious of corroborations .
  最不自觉的文体却需要有最有自觉的确证。
• It needs qualified office personnel and good telephone and telex communications .
  它需要有称职的公务人员，良好的电话、电传通讯设施。
• In short, large goals required farsighted policies, not tactical maneuvering .
  一句话，大的目标需要有高瞻远瞩的政策，玩弄策略是不行的。
• In order to measure these various cycles accurately, we need a basic time unit .
  为了精确地量度这些变化周期，需要有一个基本的时间单位。
• Most often, the ibm disk-track format is used, sometimes with minor variations .
  大多数情况下，使用IBM的磁盘磁道格式，有时需要有少许变化。
• The formula which unfortunately requires a background in advanced mathematics to understand .
  令人遗憾的是，需要有较深的数学根底才能理解这个公式。
• A source capable of maintaining a constant protential difference between its terminals is necessary .
  需要有一个能在其两个接线柱之间保持恒定的电源。
• A source capable of maintaining a constant protential difference between its terminals is necessary .
  需要有一个能在其两个接线柱之间保持恒定势差的电源。
• To construct a binary memory system of any type, it is first necessary to have a storage medium .
  要制造任何类型的二进制存贮系统，首先需要有一个存贮媒体。