But the foraging communities of the cultures in the region of the Don and Dnieper rivers took up stockbreeding and began to exploit the neighboring steppes.
但是，顿河和第聂伯河流域的游牧部落开始从事家畜饲养，并开始开发邻近的大草原。
2
Fish culture has the same objective as agriculture and stockbreeding, that is, to increase production by all means and improve its quality.
养鱼业的目标同种植业、畜牧业一样，是尽可能地增加食品的生产，提高食品的质量。
3
Various approaches have been used to improve the performance of adapted indigenous stock, including cross-breeding and upgrading through back-crossing with improved breeds, and within-line selection.