And if you're talking about tannin, oak imparts tannin, from the wood.

如果你说是单宁酸，橡木赋予单宁酸，来自木材。

But plants don’t make tannins so that humans can have long-lasting, protective clothing.

不过植物不是为了人类能有耐革穿才制造单宁酸。

Its tannins and oils are used in treating clothes and skins and making oiled paper.

它单宁酸和油可于处理衣服和毛，以及制作油纸。

It's full of tannic acid which in part gives it its red colour but also helps it resist fires.

树中富含单宁酸，这在一定程度上使它呈现红色，但也有助于帮其抵御火灾。

Five more minutes.Don't want to rush those tannins.

再5, 别弄糟单宁酸。

So, this fermentation process take two or three weeks, and sometimes even more, to get the color and the tannins out of the berries.

发酵过程需要两到三周，有时甚至更长时间，才能得到浆果颜色和单宁酸。

When acacia trees are grazed by animals, they quickly react by producing chemicals called tannins, which make their leaves unappetizing and tough to digest.

当金合欢树被动物啃食时，它们会迅速产生一种叫做单宁酸化学物质，这种物质会使金合欢树叶子变得倒胃口且难以消化。

He also discovered many useful compounds, among them ammonia, glycerin, and tannic acid, and was the first to see the commercial potential of chlorine as a bleach—all breakthroughs that made other people extremely wealthy.

他还发现了许多有化合物, 其中包括氨、甘油和单宁酸, 并且是第一个看到氯作为漂白剂商业潜力人 - - 所有这些突破都使其他人变得非常富有。