以s开头as结尾的单词

　　Research on species diversity characteristics of the arbor layer in Sassafras tzumu community.

　　闽北檫树群落乔木层物种多样性特征研究。

　　Biomass and distribution of nutrient elements in natural Sassafras mixed forests.

　　天然檫木混交林的生物量及营养元素分布&Ⅰ.生物生产量及生产力。

　　Comparison of Biochemical Properties of Rhizosphere Soil between Chinese Fir anb Chinese Sassafras.

　　杉木檫树根际土壤生化特性比较分析。

　　Study on the Effect of Mixed Forestation of Cunninghamia lanceolata and common Sassafras.

　　闽北山地杉木檫树人工混交造林效果研究。