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。