gneissic

例句：

1. 1. The rock is a gneissic igneous rock.
   这种岩石是一种花岗岩。
2. 2. The mineral deposit is located in the gneissic region.
   这个矿藏位于片麻岩区域。
3. 3. The gneissic layer is very hard and strong.
   片麻岩层非常坚硬且强壮。