Subject + 是 + 有毒 + 的 / 有毒 + 的 + Noun
有毒 (yǒudú) means "poisonous" or "toxic" and is used to describe substances, plants, animals, or other things that contain poison. It combines 有 (to have) and 毒 (poison). For example, 这种蘑菇有毒 means "This type of mushroom is poisonous."
别碰那条蛇,它有毒。
Bié pèng nà tiáo shé, tā yǒu dú.
Don't touch that snake — it's venomous.
这种野蘑菇有毒,千万不能吃。
Zhè zhǒng yě mógū yǒu dú, qiānwàn bù néng chī.
This kind of wild mushroom is poisonous; you absolutely must not eat it.
工厂排出的有毒废水污染了河流。
Gōngchǎng pái chū de yǒu dú fèishuǐ wūrǎn le héliú.
The toxic wastewater discharged by the factory polluted the river.