求翻译：要制作高品质的葡萄酒，在葡萄藤开花结果之后，必须剪除部分已开花结果的枝芽，让养分能集中在剩下的果实里，理想上每一棵葡萄藤在修剪之后，约可产出大约可供制作1是什么意思？

To produce high quality wines, after the grape vines bear fruit must be cut off some branches and buds of fruit, so that nutrients can concentrate on the remaining fruit, ideally after every vine pruning, making about output for approximately 1-4 litres required for wine grapes, of grape production per acre vineyard can range from 2 to 14 tons..