| 单词 | cyclopentadiene | 
| 释义 | cyclopentadienenoun  cy·clo·pentadiene      plural -s      : a colorless liquid unsaturated cyclic hydrocarbon C5H6 that is obtained by distillation of coal tar, that polymerizes to its stable dimer on standing, and is used in making plastics and insecticides    | 
	
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