The experiment researched the method of extracting naturalpreservation material from chilli.
本文实验研究了辣椒中天然防腐物质的提取方法。
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By the survey of butterflies in Hubei Ying mountain naturalpreservation fields, 68 species of butterflies are recorded, belonging to 45 generns and 8 families.
By the survey of snakes in Huangfu Shan NaturalPreservation Fields from 1994 to 1997, the author has found 11 kinds of snakes, in all with one to several specimens of each kind except T. stejnegeri.