水主要来源于古海水和大气降水，有机质来源于沉积岩中生物质；

The water mostly comes from ancient sea and atmosphere while organic material from ancient life-form.

youdao

水主要来源于古海水和大气降水，有机质来源于沉积岩中生物质；

The water mostly comes from ancient sea and atmosphere while organic material from ancient life-form.

youdao