maintain造句

• How do the populations maintain this homeostasis ?
  种群如何能维持这种内稳定状态呢？
• Maintaining adequate grain stocks is expensive .
  维持足够的谷物储备，代价是昂贵的。
• Engineers maintain the turbines .
  机修工维修涡轮机。
• Utility companies could install and maintain them .
  公用事业公司可以安装并保养它们。
• Our model is easy to operate and maintain .
  我们这个型号（的机器）很容易操作和保养。
• The spacing is maintained constant .
  格距保持不变。
• I maintained that it was wrong .
  我认定这是错的。
• The united nations maintains a military presence in the area .
  联合国在该地区驻有军队。
• He was adept at maintaining a psychological advantage .
  他是善于保持一种心理上的优势的。
• The king maintained order within the bound of his realm .
  国王在王国边界之内维持着秩序。
• The aircraft can't maintain the specific ground clearance .
  飞机距地面保持不了一定的高度。
• We promised to maintain employment for half a million workers .
  我们允诺要雇用五十万职工。
• The factory can not maintain current levels of production .
  该工厂不能保持目前的生产水平。
• The pace of the race was too severe to be maintained for long .
  比赛的速度极快，很难持久。
• As a result, a more even air-fuel ratio is maintained .
  因此，能维持合适的空气与燃料之比。
• It is necessary to maintain surveillance on these meters .
  必须对这些仪表保持经常性的监测。
• Its stability is only maintained by indirect repercussions .
  它的稳定是通过间接冲击维持的。
• I feel bound to maintain the honour of that uniform .
  我觉得维持这种制服的荣誉是义不容辞的。
• He maintained his children .
  他要养家糊口。
• There is a price to be paid for maintaining these safeguards .
  维持这些防范措施是要付出代价的。