Microfloral activity in worm may have an important effect on soil crumb structure.
蚯蚓类中微生物群落活性对土壤团粒结构可起重要作用。
Uniform leavening over an extended time improves the quality of many baked end-products, the crumb structure acquires finer and more uniform porosity, while the crust has greater elasticity.
在持续时间内均匀发酵可以改善许多焙烤终产品的品质；面包屑状结构具有了更好的更均匀的多孔性结构，而面包表皮也具有了更大的弹性。
Some soils, such as sandy soils, have a loose crumb structure with good drainage, whereas in clay soils the particles are small and stick together to give a dense crumb structure and poor drainage.
一些土壤例如砂土具有松散的结构，因而有良好的排水性，而在粘土中，由于土壤颗粒小而互相粘合导致粘土结构紧密排水性较差。
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