例句與造句

1. Abstract : through a study on soil aggregate composition , nutrient status and enzymatic activity under mixed forest of chinese fir alniphyllum fortunei and pure stand of chinese fir , the results indicated that , compared to pure stand , the soil structural property was ameliorated , the soil capacity of nutrient supplying and was improved , and the soil enzymatic activity were enhanced
   文摘:通過對杉木擬赤楊混交林及杉木純林土壤團聚體結構、土壤養(yǎng)分狀況及酶活性的研究表明，與杉木純林相比，混交林土壤結構性能得到改善，供肥和保肥能力加強，各種土壤酶活性提高，土壤肥力較好。
2. It's difficult to find aggregate composition in a sentence. 用aggregate composition造句挺難的