杜仲的一身有哪几种药材？Which kinds of medicinal herbs can be made from Eucommia trees？

杜仲非常特别，独科独属独一种，也是我国特有的一种植物，别称思仙。杜仲的花，叶子，树皮都能作为药材使用。作为一种重要的经济林木，在杜仲价格最高的时候，山里人栽种了大片大片的杜仲树。但是杜仲树的生长周期很长，要10年左右才能采收，等到这些杜仲树苗长大到可以采收的时候，杜仲却不值钱了，于是这些树就无人问津，年复一年的生长在大山里，越来越多，越来越粗壮。我们在山里找了一颗杜仲树，初春采花，暮春摘叶，初夏取皮，把杜仲的一身呈现给你们。在这个高考刚结束的日子里，大叔也希望所有参加高考的孩子们都能独中（杜仲）三元，独中（杜仲）榜首，独中（杜仲）鳌头。
Eucommia is a very special plant, unique in its own family and genus, and is also unique to China, alias Sisian. The flowers, leaves and bark of Eucommia can be used as medicinal herbs. As an important economic forest tree, when the price of Eucommia was at its peak, the mountain people planted large tracts of Eucommia trees. But the growth cycle of dulcimer trees is long, taking about 10 years to harvest. By the time these dulcimer saplings grow up to be ready for harvesting, dulcimer is worthless, so these trees are left untouched, growing more and more thickly in the mountains year after year. We found an eucommia tree in the mountain, picked the flowers in early spring, plucked the leaves in late spring, and took the bark in early summer to present the eucommia all in one to you.