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| Subject | Chinese | English |
| environ. | 多环碳氢化合物 | polycyclic hydrocarbon Hydrocarbon molecule with two or more nuclei; examples are naphtalene, with two benzene rings side by side, or diphenyl, with two bond-connected benzene rings. Also known as polynuclear hydrocarbon (碳氢分子与两种或两种以上的细胞核相结合，例子包括萘；有两个苯环，肩并肩，或二苯，有两个连接键的苯环。也称为多核碳氢化合物。) |
| environ. | 多环芳香碳氢化合物 | polycyclic aromatic hydrocarbon Hydrocarbons containing two or more closed rings of atoms (包含两个或多个闭合原子结构的环状碳氢化合物。) |
| tech. | 环氧一煤一碳氢化合物树脂 | epoxy-coal-hydrocarbon resin |
| tech. | 环氧一煤一碳氢化合物浆膏 | epoxy-coal-hydrocarbon resin paste |
| tech. | 环氧一煤一碳氢化合物黏结材料 | epoxy-coal-hydrocarbon binder material |
| tech. | 环氧煤一碳氢化合物粉状涂层 | epoxy-coal-hydrocarbon powder coating |
| met. | 【钢】碳氢化合物保护的环形喷嘴 | hydrocarbon-shrouded annular tuyere |
| tech. | 碳环化合物 | isocyclic compound |
| oil | 碳环化合物 | carbon ring compound |
| oil | 碳环化合物 | homogeneous ring compound |
| oil | 碳环化合物 | carbocyclic compound |
| tech. | 碳环化合物 | carbocyclical compound |
| environ. | 脂环族碳氢化合物 | alicyclic hydrocarbon A class of organic compounds containing only carbon and hydrogen atoms joined to form one or more rings and having the properties of both aliphatic and cyclic substances (仅由碳和氢原子所组成的一环或多环有机化合物，同时具有脂肪族和环状化合物的性质) |