“birch bark”簡單造句，birch bark造句子

Study of extraction of birch bark (EBB) on immune inhibition tumor effect in bearing tumor mice

We found that birch bark could serve as paper.

I put the last of my birch bark on the fire and fanned it into life.

Nomadic hunting nationalities in the north of China, such as Oroqen, Ewenki, Hezhen, all have a long history in using birch bark.

In Finland purists insist that only birch bark should be added.