Segments of these trees are then grafted onto root stalk - that's the lower section of another tree that's been chosen from a different cultivar for its superior roots and growing ability.

然后将这些树的节段嫁接到根茎上—— 这是另一棵树的下部，这棵树是从不同品种中挑选出来的，因为它具有优良的根系和生长能力。