per

• Its decay probability per second is the inverse of this time .
  每秒的衰變幾率是這個時間的倒數。
• 60 to 120 orchard trees can be serviced by one operator per hour .
  每人每小時可采收60120株樹。
• The shaft and discs rotate at about forty revolutions per second .
  豎軸和磁盤每秒鐘大約旋轉40轉。
• The drum is rotated at 20 revolutions per minute for 10 minutes .
  圓筒以每分鐘20轉的速度轉10分鐘。
• All banks measure profit in terms of earnings per share .
  銀行以每一股份的贏利額來計算自己的利潤。
• Between 60 and 70 per cent of the soldiers were literate .
  百分之六十到百分之七十的士兵是有文化的。
• Each times are usually on the order of several minutes per batch .
  每批片子每次腐蝕時間通常為幾分鐘。
• The population density of that country is 685 per square mile .
  那個國家的人口密度為每平方英里685人。
• Add 20 mg. of diatomaceous earth filter aid per liter of solution .
  對每升溶液加入20毫克硅藻土助濾劑。
• The new plant was to have a capacity of 30 tons of ammonia per day .
  這個新工廠的規模是日產30噸合成氨。