zonal pegmatite的用法和樣例：
例句
- As with other mines containing pegmatite rocks, Brazilian Alexandrite is found in rugged areas that can be difficult to access.
如其它含有偉晶巖的礦藏一樣，巴西亞歷山大石也只能在難以到達的崎嶇地區所發(fā)現。 - African Alexandrite is typically located in wet regions near rivers and mined by digging through river beds by hand to unearth the Alexandrite rich pegmatite rock.
非洲亞歷山大石都典型地分布于臨河的濕潤地區，赤手沿河床挖掘，開(kāi)采富含亞歷山大石的偉晶巖。
