2 sentences

1. 由于天气干燥，树干上的树皮开始剥离。

   yóu​yú tiān​qì gān​zào, shù​gàn shàng de shù​pí kāi​shǐ bō​lí.

   Due to the dry weather, the bark on the tree trunk began to peel off.

   Source: Dong Chinese Dictionary

2. 这种中药材是用桂的干燥树皮加工而成的。

   zhè zhǒng zhōng​yào​cái shì yòng guì de gān​zào shù​pí jiā​gōng ér chéng de.

   This traditional Chinese medicine is processed from the dried bark of the cassia tree.

   Source: Dong Chinese Dictionary