1. One of a group of colorless, volatile, heterocyclic organic compounds containing a ring of four carbon atoms and one oxygen atom, obtained from wood oils and used in the synthesis of furfural and other organic compounds. 
   呋喃无色、易挥发的杂环有机化合物的一种，含有一个由四个碳原子和一个氧原子构成的环，从桐油提炼出来，用于合成糠醛及其它有机化合物
2. channel point, meridional point 
   经穴
3. PPP(Point to Point Protocol) 
   点对点通讯协议
4. Point of penetration; breakthrough point 
   切入点
5. nodal point voltage method 
   节点电压法

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