humus什么意思？

humus的音标：humus的英式发音音标为：['hju:məs]humus的美式发音音标为：['hjuməs]...

Earthworms consume large amounts of soil, and produce a rich humus, perfect in texture.蚯蚓吃下大量土壤，排出肥力丰富、物理结构理想的腐殖质。The lack of humus and the excessive leaching make this soil almost useless for agricultural purpose.缺少腐殖质和...