chemical components of essential oil

• 挥发油

chemical components of essential oil的用法和样例：

例句

1. Study on chemical constituents of essential oil from Mentha spicata L.
   留兰香挥发油化学成分的研究。
2. Objective The components of the volatile oil from Cynanchum atratum were analyzed.
   目的分析直立白薇挥发油的化学成分。