从E 偶觉得不能推出 reduce the labor cost by emilinating the need for manual weeding, E没有说干活的人什么也不干 而是说去干其他的事情了 那么农场主还是要给他们工钱啊 其实也没有reduce the labor cost啊 D好好的读了一下 说的就是selection and genetic manipulation enables plants of any speices to bear an unique shade of color. Such manipulation facilitates the weeding machine to tell weeds from crop plants, and hence will work more efficiently. Selection and genetic manipulation-->distinctive color of each plant-->the weeding machine will work more efficiently
[此贴子已经被作者于2006-7-1 14:38:35编辑过] |