They keep the harmful air out.

它们把有害的空气挡在外面。

Ozone is one of the most harmful air pollutants.

臭氧是最具危害性的空气污染。

Full combustion, Then can make the output and harmful air attain the least and make use of the fuel with maximum limit.

在燃烧过程中必须实现油的充分燃烧，才能使产生的有害气体达到最小，最大限度地利用燃料。

The harmful air pollution of boiler smoke is introduced and the measure to burn coal fully and reduce the pollution is adopted.

介绍了锅炉烟气对大气污染的危害及采取锅炉节煤措施，使燃料充分燃烧、缓解污染的方法。

It said that tests showed that separate smoking rooms failed to stop potentially harmful air particles wafting into non-smoking areas.

德国癌症研究中心说，测试显示，单独的吸烟间不能阻止潜在的有害空气粒子飘进非吸烟区。

If there is something harmful in the air, the eyes fill with tears.

如果空气中有有害的东西，眼睛就会充满泪水。

If there is something harmful in the air, tears protect your eyes by covering them.

如果空气中有一些有害的东西，眼泪会通过遮住眼睛来保护眼睛。

Dirty air and water are harmful.

肮脏的空气和水是有害的。

In today's world, almost everyone knows that air pollution and water pollution are harmful to people's health.

在当今世界，几乎每个人都知道空气污染和水污染对人们的健康有害。

This can be really dangerous because there are harmful chemicals in the smoke from both wood and coal and they can seriously pollute the air in your home.

这是非常危险的，因为木材和煤炭产生的烟雾中都含有有害的化学物质，会严重污染家里的空气。

The Clean Air Act mandates the EPA to regulate harmful pollutants such as particulate matter and ozone.

《清洁空气法》授权美国环保局监管有害污染物，如微粒物质和臭氧。

Cremation puts harmful gasses into the air including dioxins, mercury vapor from dental fillings, hydrochloric acid, carbon dioxide and sulfur dioxide.

火葬向大气排放的有害物质有：二恶英、水银蒸汽(如果死者有假牙的话)、盐酸、二氧化碳和二氧化硫。

The air should be kept fresh and natural avoiding various exceeding harmful gases and materials.

居住环境空气要保持清新、自然，防止各种有害气体和物质的深度超标。

It found that Londoners breathe in air that is more harmful than that in Accra, the capital of Ghana.

研究还发现伦敦人呼吸的空气远比加纳的阿克拉的空气有害。

Factories, power stations, and rehicles exhausts[1] pump harmful gases into the air, contributing to global warming, causing acid rain[2], and destroying the ozone layer.

工厂、火力发电站和车辆将有害废气排放到空气中，是造成全球气候变暖，出现酸雨，破坏臭氧层的罪魁祸首。

Leaves can be absorbed from the smoke-filled air nicotine and other harmful substances, and through photosynthesis and convert them into harmless substances in the plant's own.

叶片可以从烟雾弥漫的空气中吸收尼古丁和其他有害物质，并通过光合作用将之转换为无害的植物自有的物质。

Trees are natural air conditioners. They take harmful gas from the air, and release oxygen into the air.

树木是天然的空气净化器，他们可以吸收空气中有害的气体并向空气中释放氧气。

Anirudh Sharma doesn't just want to pull harmful carbon from the air. He wants to offer a cheaper alternative to the exorbitant costs of ordinary printer ink.

阿尼鲁德·夏尔马不仅想除掉空气中的有害炭物质，还希望创造一种更便宜的普通打印机油墨，解决墨水价格高昂的问题。

The inner layer is made of vinyl strips coated in a photocatalyst material that captures and neutralises harmful particulates in the air.

内层由乙烯基片组成，它被覆盖了光催化材料，这种基片可捕捉并中和空气中的有害颗粒。

It purified the air, killing harmful bacteria.

它净化了空气，杀死了有害细菌。