tubes in the tree's truck carry water from the roots down to the _英语解答

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?

人气：129 ℃　时间：2019-12-16 06:16:58

解答

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