1. Most granitic rocks contain feldspathic minerals such as orthoclase or plagioclase.
大部分花岗岩石中含有含石英的矿物质，如正长石或斜长石。
2. The feldspathic sandstone is commonly used as a building material due to its durability.
由于其耐久性，长石砂岩常被用作建筑材料。