我们对农业学的知识至今只限于书本上所说的。
Our knowledge about agriculture has so far been exclusively confined to books.
从人类学的角度来看，探究一些社会采用农业而另一些社会保留狩猎采集者或园艺学家的条件是很重要的。
It is anthropologically important to inquire into the conditions that made some societies adopt agriculture while others remained hunter-gatherers or horticulturalists.
但是有着农业经济学哲学博士的前将军看起来一点也不担心。
Yet the former general with a PhD in agricultural economics appears to be anything but worried.
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