This unconscious process of selection has been the great agency in the formation of the most distinct and useful domestic breeds.

这种无意识的选择过程是形成最独特和最有用的家养品种的重要因素。

Livingstone states that good domestic breeds are highly valued by the negroes in the interior of Africa who have not associated with Europeans.

利文斯通说， 非洲内陆未与欧洲人交往的黑人非常看重优良的家养品种。

The Chinese Li Hua is believed to be one of the oldest domestic breeds, based on it being mentioned throughout ancient Chinese literature.

中国李花被认为是最古老的家养品种之一， 因为它在整个中国古代文学中都有提及。

These views appear to explain what has sometimes been noticed, namely, that we know hardly anything about the origin or history of any of our domestic breeds.

这些观点似乎解释了有时被注意到的事情，即我们对任何家养品种的起源或历史几乎一无所知。