N any of a class of simple unsaturated hydrocarbons, such as isoprene, having the formula C5H8 半萜
The hemiterpene matters used by the invention are all excretive by the autophage process of the plants.
本发明所使用的萜类物质均是植物自身代谢过程中分泌的物质。
The hemiterpene matters used by the invention are all excretive by the autophage process of the plants, thus having no toxic hazard;
本发明所使用的萜类 物质均是植物自身代谢过程中分泌的物质，无毒害；
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