The Poisonous and Harmful Substances or Elements means that in electronic products, there are to the followings.

有毒、有害物质或元素，是指电子信息产品中含有的下列物质或元素。

youdao

They are concerned about mental illness and anxiety, and a possible jump in the use of tobacco, alcohol, and other harmful substances.

他们关注精神疾患和焦虑问题，关注烟草、酒精和其他有害物质的使用可能会有大幅上升。

youdao

They are also concerned about mental illness and anxiety, and a possible jump in the use of tobacco, alcohol, and other harmful substances.

他们还担心精神疾患和心理忧虑问题，担心烟草、酒精以及其它有害物质的使用可能上升。

youdao

The chip removed ninety-nine percent of the salt and other harmful substances from water samples.

VOA: special.2010.04.05

The experts said some plant chemicals are high in antioxidants -- substances that remove harmful chemicals from the body.

VOA: special.2009.05.19

But when a person is in shock, their organ walls become more permeable, letting harmful substances in and out more indiscriminately, researchers say.

BBC: News

It was blue-sky research, but their idea was that harmful substances should be produced where they are needed, instead of being shipped in bulk from chemical factories.

FORBES: Pip-squeak Power Plant

The hope is that they will develop a broad aversion to harmful substances that will stay with them through their late teens and early 20s, when drug use peaks.

ECONOMIST: But efforts to warn people off drugs are still too timid