racial是什么意思

用法例句

There were differences in species richness,spore den-sity and species diversity of AM fungi between the two regions.

两地土壤中AM真菌种的丰度、孢子密度和物种多样性指数等存在差异:菏泽赵楼牡丹园AM真菌种的孢子密度最高,而其种的丰度最低;洛阳矬里牡丹种苗基地的孢子密度最低;菏泽种苗基地的Shannon-Wiener指数显著高于其他样地。