per

• We beg to consign the following per s.s . ‘london' .
  請由“倫敦”號輪船運交下列各物。
• By the charge density we mean the per unit volume .
  所謂的電荷密度是指單位體積的電荷。
• Frequency is measured in hertz, or cycles per second .
  頻率用赫茲即每秒鐘的周數來計算。
• The velocity of light is about 300,000 kilometres per second .
  光速約為每秒30萬公里。
• Meals average out at 5 per head .
  膳食平均每人。
• I hear you can't get more than six feet of cloth per man .
  我聽說你們每人只能買6英尺布。
• It is two hundred yuan per month .
  每月200元。
• The fare for the descent was fixed at five dollars per head .
  地下參觀的價格是每人五塊美金。
• Such beds should reduce travelling distance per acre .
  這種帶狀栽植能減少單位面積的周轉距離。
• In this area the per mu yield of wheat for an average year is 500 jin .
  這兒小麥常年畝產500斤。