tree bark

基本解释

Recoiling in pain, I’d scrape my back or arms on the scaly tree bark.
碰疼时我本能后退，结果又被粗糙的树皮擦伤背或胳膊。
In the thick forests of central and west Africa, troops find plentiful food for their vegetarian diet. They eat roots, shoots, fruit, wild celery, and tree bark and pulp.
部落一般在中部和西部非洲的密林这些植被丰富的地方，找寻适合自己的食物：他们吃植物的根，竹笋，水果，野生芹菜，树皮和果肉。
The workers survived underground by subsisting on sawdust, tree bark and turbid water, rescuer Chen Yongsheng told reporters.
救护队员陈永生告诉记者，被困人员在井下靠吃木屑，树皮，喝凉水来维生。

These include sassafras,vanilla, wintergreen, cherry-tree bark, licorice root, black cherry and cane sugar.
Small pieces of tree bark or cut up leaves can be used.

Two years later they're found living off tree bark, wearing animal skins and making nutritional smoothies out of locally gathered herbs and their own urine.
FORBES: Magazine Article
The main culprit in the cinnamon powder is actually derived from tree bark and contains cellulose, an undigestible fiber capable of producing a strong inflammatory response in lung tissue, leading to long term wheezing and a chronic cough, potentially placing patients at further risk for bouts of pneumonitis or even aspiration pneumonia.
FORBES: An ER Doctor's Perspective on "The Cinnamon Challenge": Don't Even Think of Doing It