一倍

• The baby doubled its weight in a year .
  婴儿的体重一年增加了一倍。
• Gas prices would double in 1979 .
  汽油价格在1979年要上涨一倍。
• The output is double that of last year .
  产量比去年增加一倍。
• His money doubled in three years .
  他的钱三年增加了一倍。
• I'll double the guards on it from now on, i guess .
  我想以后还要把卫兵增加一倍。
• Their fortune doubles ours .
  他们的财产比我们的多一倍。
• Little celia is worth two of her .
  小西莉亚比她好一倍。
• This numeral means a onefold increase in production .
  这个数字意味着产量提高了一倍。
• The world's population has doubled during the last four decades .
  过去40年中世界人口增加了一倍。
• The resistance is halved if the cross-sectional area is doubled .
  如果截面积增加一倍，则电阻减少一半。