Then the young larvae drill into and feed on the innerbark.
它放置幼卵在树皮上，然后幼虫钻入树皮中长大。
2
The most popular material is the innerbark of the paper mulberry tree.
最流行的材料是纸桑的内层书皮。
3
If you peel birch bark in the winter, we call it "the winter bark", another layer, a tougher inner layer of the tree adheres to the bark, producing a stronger material.