操作

• If the site is small, it may be commanded by a gantry crane .
  假如场地小，则可采用龙门式吊车进行操作。
• Balloons are much easier to handle , and are also vastly cheaper .
  气球操作起来却简单的多，也大为低廉。
• Beneficiation removes clay and silica to considerable extent .
  富集操作除去粘土和硅石达到相当高的程度。
• These extremes should not be used to represent their performance .
  这些极端情况不能用来表示它们的操作。
• At least one dress rehearsal should be performed in dark twilight .
  至少应在晨昏时进行一项实际操作练习。
• He took the machine apart to show every detail of its operation .
  他把机器拆开，让大家看操作的每个细节。
• This is done because of the ease of handling and cost of manufacturing .
  这样做是因为操作方便，制造省钱。
• Her two guns were too unwieldy for accurate shooting .
  她的两门火炮笨重至极，很难操作，不能进行准确射击。
• The first assumption is only satisfied close to the start of a run .
  第一种假设只是在操作刚开始时才能满足。
• Carbon is needed as a reducing agent in many metallurgical operation .
  许多金属冶炼操作中需要碳作为还原剂。