saving water resource的用法和樣例：
例句
- We should vigorously call for conserving water.
我們要大力提倡節約水資源。 - There are some examples where irrigation systems have been transformed into propagable profitable businesses, reducing water use without affecting crop useyields.
這有幾個(gè)例子列舉出來(lái)灌溉系統被改造成可盈利的產(chǎn)業(yè)，節約水資源的使用卻不影響作物的產(chǎn)量。
