demonstration zone的用法和樣例：
例句
- We will expand ecological demonstration zones.
加強生態(tài)示范區建設。 - 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(gè)農業(yè)高新技術(shù)開(kāi)發(fā)示范區，已劃出了十八萬(wàn)畝土地作為中心示范區。
