| 释义 |
〔retene〕A crystalline compound, C18H 18, derived from pine tar, fossil resins, and tar oils. 惹烯:一种结晶化合物,C18H 18,从由松焦油、化石树脂及焦油中提取 〔pine〕Any of various evergreen trees of the genusPinus, having fascicles of needle-shaped leaves and producing woody, seed-bearing cones. These trees are widely cultivated for ornament and shade and for their timber and resinous sap, which yields turpentine and pine tar. 松树:一种松树 属常青树,有针状叶簇且产出木质带籽的球果。这种树作为装饰、乘凉、木材和产生松油和松焦油的树脂而广泛种植 |