Chinese tannin

例句：

1. 1.Chinese tannin is a natural pigment used in the production of paints and dyes.
   中国鞣酸是一种天然色素，用于生产油漆和染料。
2. 2. The Chinese tannin in tea leaves helps to remove impurities from the body.
   茶叶中的鞣酸有助于从身体中去除杂质。
3. 3.The Chinese tannin in wine is believed to have health benefits.
   红酒中的鞣酸被认为有健康益处。