例句與造句

1. The harms of soil compaction represented briefly as soil bulk density and penetration resistance increased , macroporosity decreased , soil physical , chemical and biological properties deteriorated , which effected on crop growing and soil structure degradation , and has become one of the principal obstacle factors for sustainable development of agriculture
   土壤機械壓實危害主要表現(xiàn)在土壤容積質量和機械阻力增加，大孔隙減少，土壤物理、化學、生物性狀惡化，進而影響作物的生長發(fā)育，土壤結構發(fā)生退化，已成為當前制約農業(yè)可持續(xù)發(fā)展的障礙因素之一。
2. It's difficult to find structure degradation in a sentence. 用structure degradation造句挺難的