tubes in the tree's truck carry water from the roots down to the leaves.
问题描述：
tubes in the tree's truck carry water from the roots down to the leaves.
为什么句子中的down是错误的?
答
from the roots up to the leaves
整句翻译：树干中的导管将根部的水运送到叶片上.
根是在下面的,树叶在顶端,所以应该用up而不是down