山坡水土保持工程 water and soil conservation measures: 水土保持措施water-and-soil conservation measures: 水土保持措施soil conservation measures: 土壤保持措施act of soil and water conservation: 水土保持工作條例bulletin of soil and water conservation: 水土保持通報下載手機(jī)詞典可隨時隨地查詞查翻譯