demonstration zone的用法和樣例：
例句
- We will expand ecological demonstration zones.
加強生態示範區建設。 - Currently, ten agricultural new high level technology development and model zones have designated 180,000 mu of land to become the central model zone.
目前，十個農業高新技術開發示範區，已劃出了十八萬畝土地作為中心示範區。
