| 释义 |
〔allethrin〕A synthetic clear or amber-colored viscous insecticide, C19H 26O 3, similar to pyrethrin. 丙烯除虫菊酯：一种合成的透明或琥珀色粘性杀虫剂，C19H 26O 3，与除虫菊酯相似 〔polypropylene〕Any of various thermoplastic resins that are polymers of propylene. They are hard and tough, and are used to make molded articles and fibers.聚丙烯：一种热塑性树脂，它是丙烯的聚合物。它们都很坚硬，而且被用来制造铸造件和纤维〔propylene〕A flammable gas, CH3CH:CH 2, derived from petroleum hydrocarbon cracking and used in organic synthesis. Also called propene 丙烯：一种易燃气体，化学式为CH3CH:CH 2，提炼于石油的碳氢化合物裂化蒸馏，用于有机合成 也作 propene |