mafic component的用法和樣例：
例句
- Biotite is a subordinate constituent of the mafic and ultramafic rocks generally.
黑雲母一般是鎂鐵質及超鎂鐵質岩石中的次要成分。 - Wenquan granite is composed of two end-member rocks, one is the host rock of the acid end-member, and the other is the microgranular mafic enclave.
摘要溫泉花崗岩體由酸性端元的寄主岩石和暗色微細粒鎂鐵質包體群及基性岩牆群組成。
