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1.Mr. Smith gave a lesson on how to improve soil .
史密斯先生讲了一堂如何改良土壤的课。收藏指正
2.A green manure is a crop grown mainly to improve soil fertility.
种植绿肥作物主要是为使土壤更加肥沃。收藏指正
3.West Indian forage plant cultivated in southern United States as forage and to improve soil.
在美国南部栽培的一种西印度的饲料植物，也用于改善土壤质量。收藏指正
4.A mixture of decaying organic matter, as from leaves and manure, used to improve soil structure and provide nutrients.
堆肥腐烂有机体的混合物，如树叶或粪便，用来改善土壤结构并增加土壤养分收藏指正
5.and that long-term intercropping of Chinese milk vetch with productive citrus plantation could also enhance the utilization rate of sun light, maintain high fertilizer efficient, improve soil fertility significantly, increase fruit yield and improve the exterior quality of fruits.
成龄桔园长期间作紫云英也具有提高光能利用率，维持较高的肥料养分效率，明显改善土壤肥力，提高产量和改善柑桔外观品质等多种效益。收藏指正
6.improve [ameliorate] the soil
改良土壤收藏指正
7.They found many ways to improve the soil.
他们找到了很多改良土壤的办法。收藏指正
8.THE TEST STUDY TO IMPROVE EXPANSIVE SOIL IN THE SOUTH OF SHAANXI WITH ADDING IN ASH CONTENT
陕南膨胀土加灰改良的试验研究收藏指正
9.Sorghum farmers in eastern Uganda , working with scientists, have tested some lower-cost ways to improve their soil.
东乌干达种植高粱的农民与科学家们一起，对用更为节约成本的方法改善当地土质做了试验。收藏指正
10.For improve site soil condition and ensure piling work safety, we have worked out dewater construction proposal.
为改善现场施工的场地条件,保证压桩工程的安全进行,编制降水工程的施工方案.收藏指正
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