I know people make utensils out of wood, but utensils out of tree bark?
我知道人们用木头做餐具，但是用树皮做餐具？
The grey bark of the tree was deeply grooved.
树上的灰树皮充满了深深的沟槽。
He made a gash in the bark of the oak tree with a sharp knife.
他用一把锐利的刀子在橡树的树皮上割了一道锐利的伤口。
The most popular material is the inner bark of the paper mulberry tree.
最流行的材料是纸桑的内层书皮。
Tree bark is used to make many kinds of medicine.
树皮可用来制作很多种药。
Tree bark is used to make many kinds of medicine.
树皮可用来制作很多种药。
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