The origin, distribution, variety characters, production trait, fertility, utilization, adaptability, disease resistance, and feeding conditions of Boer goat were introduced.
详细介绍了波尔山羊的起源、分布、品种特性、生长发育、生产性能、繁殖性能、利用途径、适应性、抗病力及饲养条件等。
Based on the characters of structure, land form, hydrogeology, water environment, rock and mineral geochemistry, and so on, this paper has studied the origin of the distribution of high-arsenic water.
本文从构造、地貌、水文地质和水环境、岩矿地球化学等方面特征，论证了高砷水分布区的成因，从而为改水提供了基础。
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