Drinking lots of Activia didn't make much difference to a healthy person, they found, although it did not have any harmful effects.

研究人员发现，对身体健康的人来说，饮用大量的Activia并无多大用处，不过也没有任何害处。

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When children talk to others online, they do not realize they could actually be talking to a harmful person.

当他们跟别人在网上聊天时，他们不知道他们可能正在跟一个有害的人聊天。

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Modeling a skeleton for the ashtray, when any person to lighted cigarettes into the top, it will begin to speak:! Remind us smoking harmful to health!

以骷髅为造型的烟灰缸，当任何人把点燃的香烟放到上头时，它便会开始说话：！提醒着我们吸烟有害健康！

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Those "dark alleys" are where fake photos and harmful downloads are most likely to damage a person's computer, he said.

CNN: 'Most dangerous' celebs to search for online

But if harmful levels of stress continue for too long, a person may lose the ability to relax, a condition linked in research to numerous health problems.

WSJ: Stress at Work: Why Women Feel It More Than Men