一级

• Each of them took his "cut" before passing the moneys on a higher level .
  他们每一个人在将钱交给上一级机关之前，都截留下自己的“折扣”。
• Screening and sedimentation are the two types of primary treatment used for textile wastes .
  筛滤和沉淀是用于纺织废水的两种一级处理方法。
• The decomposition of a radioactive element is the simplest example of a true first order reaction .
  放射性元素的衰变是真正一级反应最简单的实例。
• The first-order corrections to the wave functions will mix substantial 2s character into the 2pmo's .
  波函数的一级校正将相当多的2s成分混入到2pMO
• We present the national primary and second ambient air quality standards as upper bound guideline .
  我们把国家一级和二级环境大气质量标准作为上限控制线。
• He had been advertised in advance as the most sympathetic and genial officer in a division command .
  他早在来前就闻得将军是师一级首长中最和蔼可亲的一位。
• Margaret shone as one of the brighter pupils in her year, and was very soon put up a form .
  玛格丽特学习突出，在同年级学生中出类拔萃，很快就向上跳了一级。
• Equation(4－198)yields a first approximation for the change in the natural frequency of vibration .
  方程（4198）给出了一级近似下的固有振动频率的改变量。
• The silence on the top level was oppressive, and i thought it my duty to break the ice .
  最高一级官员的缄默是令人难堪的，因而我认为我应当打破这个沉闷局面。