1. Reduction to a liquid form; liquefaction. 
   融化；液化缩减成液体形式；液化
2. Scottish-born chemist and physicist who studied the liquefaction of gases and the properties of matter at very low temperatures and invented cordite(1889) with Sir Frederick Abel. 
   德瓦，詹姆斯1842－1923出生于苏格兰的化学家和物理学家，研究气体的液析和物质在超低温下的特性，于1889年和弗雷克·艾贝尔先生一起发明了无烟火药
3. channel point, meridional point 
   经穴
4. PPP(Point to Point Protocol) 
   点对点通讯协议
5. Point of penetration; breakthrough point 
   切入点

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• 1. 液化点
  liquefaction 熔化...liquefaction point 液化点...liquefied gas 液化气体
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