覆盖在森林地表的一层薄土很容易被冲走。
The thin soil that covers the forest floor can be easily washed away.
酸雨对森林地表层的土壤来说，它改变了原来的pH值'。
When acid rain falls on forest floors, it changes the ingredients - the 'PH level' - of the soil.
当木蚁死亡时，寄生菌从其上破头而出，伸出孢子囊，孢子会在晚上播撒到森林地表。
Once an ant has died, the fungus sprouts from its head and produces a pod of spores, which are dropped at night on to the forest floor.
应用推荐