The drug is not harmful per se, but is dangerous when taken with alcohol.

这种药本身无害，但与酒同服就危险了。

《牛津词典》

Be king, if it please thy mad humour, but be not harmful in it.

假如你的疯子头脑高兴，你就做国王吧，但不要惹出祸害来。

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He went on, "The enzyme is not harmful to humans or animals, and it is friendly to the environment."

他接着说，“这种酶对人类和动物没有伤害，而且对环境是友好的。”

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Jurgen Rehm said having one or two drinks a day is not as harmful as having seven drinks at once.

VOA: special.2009.09.08

It's a common bacterium and most strains of E. Coli are not harmful to people, in fact, they provide us with some beneficial properties.

它是常见菌,且大多数种类的菌株对人类无害,实际上还给了我们颇多裨益

耶鲁公开课 - 生物医学工程探索课程节选

when you want someone to, not to do something that's going to be harmful or uncomfortable or strange.

或者你不希望某人做一些有害的，令人不安的或是奇怪的行为。

Don't 课堂 - SpeakingMax英语口语达人

Radiation levels there are still normal and not harmful to human health, a ministry spokeswoman said.

FORBES: Radiation Levels Ok In Russia As Plutonium Found In Japanese Soil

Natural measles infection, while not harmful to most children, carries a slight risk of permanent disability - or even death.

BBC: Childhood measles may protect from asthma

"I find it challenging and rewarding to work out ways into the future which are not harmful to us, " he said.

CNN: Biography: Gerhard Knies