过去，甚至在今天的现代田园生活，动物在经济学中起到了重要作用。
In past times, and still in rural cultures today, animals have played an important role in economics.
生态学指研究动物居住环境经济学的科学。
By ecology, we mean the science of the economy, of the household of animal organisms.
猪作为一种重要的农业经济动物和医学动物模型，有其独特的生物学特性、经济学价值和医学价值。
As an agricultural animal and a laboratory model, pig has important economic values and special biological characteristics.
猪作为一种重要的农业经济动物和医学动物模型，有其独特的生物学特性、经济学价值和医学价值。
As an agricultural animal and a laboratory model, pig has important economic values and special biological characteristics.
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