例句與造句

1. Silvology is seen as a single science for forestry and was first used by Roeloff Oldeman.
2. Focusing on soil properties, Oldeman estimated that about 19 million square kilometers of global land area had been degraded; Dregne and Chou, who included degradation of vegetation cover as well as soil, estimated about 36 million square kilometers degraded in the world s dry regions.
3. It's difficult to find oldeman in a sentence. 用oldeman造句挺難的