They only stimulate and activate our immune system to work, telling it something harmful is coming in.

它们只是刺激并激活我们的免疫系统工作，告诉它有害的东西来了。

youdao

The camera, also acting as a detector that finds trapped people and detects harmful gases, is placed in the robot, which can work in the dark.

摄像头被放置在机器人体内，可以在黑暗中工作，它还可以充当探测器，发现被困人员和检测有害气体。

youdao

Work should focus on preventing HIV and pregnancy during adolescence, and preventing the adoption of risk behaviours (e.g. tobacco and harmful use of alcohol) linked to non-communicable diseases.

工作应重点关注预防艾滋病毒和少女怀孕，以及预防与非传染性疾病相关的危险行为(如烟草和有害使用酒精等)。

youdao

After the 2004-2005 lockout, both sides understand how harmful a work stoppage would be to the game.

FORBES: Can The NHL Avoid Another Costly Lockout?

They say it's not just binge drinkers who are susceptible to liver disease: sharing a bottle of wine over dinner or having a couple of drinks after work may be harmful, too if the alcohol consumption is regular enough.

CNN: Love your liver to live longer

This is likely to confirm the prejudices of many here in Britain who believe that providing charity to Africa is a waste of time, and may be harmful to the hugely beneficial work done by many charities who work directly at the point of need.

BBC: Your comments: Addicted to Aid