Electronic wastes also contain many poisonous metals.

　　電子垃圾也會(huì)含有很多有毒金屬物。

　　The poisonous heavy metal is one of the major pollutants.

　　有毒重金屬是主要污染物之一。

　　Some plants are poisonous and should be handled with care.

　　有些植物有毒，必須小心對待。