Now researchers studying chickens have not only confirmed this but also found other changes brought on by farming. In particular, the dumbness would appear to be aggravated by stress.
鸡研究专家现已证实了这一点，并且发现了驯养所致的其它改变，特别是动物在应激时会变得更加安静。
Now researchers studying chickens have not only confirmed this but also found other changes brought on by farming. In particular, the dumbness would appear to be aggravated by stress.
鸡研究专家现已证实了这一点，并且发现了驯养所致的其它改变，特别是动物在应激时会变得更加安静。
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