俗称茶单宁，是茶叶特有成份，具有苦、涩味及收敛性。

Commonly known as tea tannin, is a unique composition of tea, with bitter, astringent and convergence.

youdao

俗称茶单宁，是茶叶特有成份，具有苦、涩味及收敛性。

Commonly known as tea tannin, is a unique composition of tea, with bitter, astringent and convergence.

youdao