erosion – n. the slow wearing away of something

nodules – n. a small lump on the root of a plant

sustenance - n. something that keeps something alive

ecosystem – n. everything that exists in an environment

absorb – v. to take in something like a liquid in a natural way

foundation – n. something that provides support for something
 2/4   首页 上一页 1 2 3 4 下一页 尾页