速率

• The actual rate of decay may be somewhat greater or less than this expected rate .
  衰变的实际速率可以比这个预期速率稍大些或稍小些。
• The rate of heat flow between any two points increases with difference of temperature .
  任何两点间的热流动速率则随温差的加大而增加。
• Speed is a derived concept defined mathematically in terms of length and time .
  速率是一个导出的概念，在数学上是用长度和时间表示的。
• A 15-minute dose of red light can double the previous respiration rate of the plants .
  照射15分钟红光可使植物原来的呼吸速率提高一倍。
• I step up the breathing rate--timing the contraction and relaxation of chest muscles .
  我增加呼吸率--调节胸部肌肉的收缩和舒张的速率。
• More often, all of the materials exposed to the etchant have a finite etch rate .
  通常，所有暴露在刻蚀剂中的材料都具有一定的刻蚀速率。
• In the alternate approach, the burning rate is expressed as a function of drop radius .
  在另一种方法中，燃烧速率表示为液滴半径的函数。