成藏地质要素
geologic accumulation element
软质要素与硬质要素
Soft elements and solid element
物质要素的艺术化
Immutability of architecture
材料品质要求
requirements of material qualities
材质要求
quality requirements of materials
Technical requirement of material quality
气质要求
requirements for gas quality
水质要求
water quality requirement
BIF三要素
three essential factors for BIF formation