Air quality is represented by annual mean concentration of fine particulate matter (PM10 and PM2.5, i.e. particles smaller than 10 or 2.5 microns).
空气质量用年平均细颗粒物的浓度表示(PM10至PM 2.5，即粒径小于等于10或2.5微米的细颗粒)。
There is evidence that particles smaller than 100 nanometers can pass through cell membranes and migrate into other organs, including the brain.
有证据表明小于100纳米的粒子可以穿过细胞膜，并迁移到其他器官，包括大脑在内的。
Fine particulate matter - particles smaller than 2.5 micrometers - can evade hairlike projections in the nose and trachea that trap larger particles.
细颗粒物——小于2.5微米的颗粒——能躲过鼻子和气管中绒毛的保护作用。
We believe most of the dark matter is made up of new particles smaller than atoms that are different from anything scientists have ever discovered and studied.
我们认为大多数暗物质是由比原子还小的新粒子构成，这些粒子与科学家们已发现和研究过的任何粒子都不一样。
The southwest Iranian city of Ahvaz walked away with the unfortunate distinction of having the highest measured level of airborne particles smaller than 10 micrometers.
伊朗西南部城市阿瓦士不幸成为空气最糟城市，该市空气中小于10微米的颗粒物含量是最高的。
The list, which relies on country-reported data over the past several years, measures the levels of airborne particles smaller than 10 micrometers - so-called PM10 s - for almost 1,100 cities.
该排名是依据各国在过去几年内报告的数据得出的，测量了近1100个城市空气中小于10微米的颗粒物(可吸入颗粒物)的含量。
The list, which relies on country-reported data over the past several years, measures the levels of airborne particles smaller than 10 micrometers - so-called PM10s - for almost 1, 100 cities.
该排名是依据各国在过去几年内报告的数据得出的，测量了近1100个城市空气中小于10微米的颗粒物(可吸入颗粒物)的含量。
The list, which relies on country-reported data over the past several years, measures the levels of airborne particles smaller than 10 micrometers – so-called PM10s – for almost 1, 100 cities.
这份榜单是根据1100个城市中，过去几年国家记录的小于10微米空气颗粒——也称PM10s的污染数据而排出的。
The list, which relies on country-reported data over the past several years, measures the levels of airborne particles smaller than 10 micrometers — so-called PM10s — for almost 1,100 cities.
该排名是依据各国在过去几年内报告的数据得出的，测量了近1100个城市空气中小于10微米的颗粒物（可吸入颗粒物）的含量。
Aerosol particles smaller than 2.5 micrometers pose the greatest risk to human health because they are small enough to be breathed deep into the lungs and, in some cases, enter the blood stream.
小于2.5微米的悬浮微粒对人体的健康造成了最大的危害因为它们小到可以被吸入肺部深处，在某些情况下，还会进入血液中。
The rocks get broken down into smaller and smaller particles as they are weathered.
岩石在风化过程中被分解成越来越小的颗粒。
They may break into smaller plastic particles that spread widely in the environment.
它们可能会分解成更小的塑料颗粒，在环境中广泛传播。
Under such conditions atomic nuclei "evaporate" into a plasma of even smaller particles called quarks and gluons.
在这种情况下，原子核将会蒸发成等离子体，甚至是更小的粒子，比如夸克和胶子。
Because the available water is spread among more particles, the cloud droplets that form in the ships' wakes are smaller than typical Marine layer cloud droplets.
由于这些水分分散在更多的颗粒中，在船舶航迹中形成的云滴比典型的海洋层云滴要来的小。
Larger particles get deposited in fans that point in the direction of surface winds, while smaller pieces remain suspended above.
大一些的微粒以扇状的形式沉积下来，扇尖朝向地面风的方向。而小一点的微粒仍然在火星上空中漂浮。
The smaller the particles, the slower they come back down again.
颗粒越小，它们沉降得越慢。
These fine particles, about 30 times smaller than the width of a human hair, are also a major cause of poor visibility.
这些细小的粒子比人类头发的直径还要小大约三十倍左右，它们同时也是造成能见度低的主要原因。
ALICE squeezes even more out of the aluminum by using nano-scale particles with diameters of 80 nanometers, or 500 times smaller than the width of a human hair.
ALICE通过比人类头发细500倍、直径80纳米的纳米颗粒，甚至能从铝中获得更多。
The smaller sorts of airborne particles are alone thought to cause 380,000 premature deaths in Europe every year.
据认为，在欧洲单是空气播散的微小颗粒物每年就造成380,000例早产儿死亡。
Writing in the journal Diabetes Care (PDF), a team of researchers looked at the most insidious of these particles -- only those smaller than 2.5 micrometers in diameter.
在杂志《糖尿病治疗》中（PDF），一组研究人员研究了最容易被忽视的一些微粒——仅限于直径小于2.5微米的。
Black carbon particles are smaller than sulfate particles and can be lofted much higher by solar heating, where their influence on climate can last up to a decade.
黑炭颗粒比硫化物颗粒要小，在吸收太阳热量的情况下会升腾的更高。在高空，它们对于气候的影响会持续上十年。
Those molecules themselves are composed of smaller particles that have positive and negative charges of electricity.
那些分子本身是由若干更小的带有正负电荷的微粒所组成的。
At one time scientists thought that there was nothing smaller than an atom but now most people know that an atom consists of even smaller particles.
科学家曾一度认为没有比原子更小的东西了，但现在大多数人都知道原子是由更小的粒子构成的。
Scientists say there could be tens of millions of smaller particles, such as bolts or chunks of frozen engine coolant, that cannot be discerned from Earth.
科学家说，空间中可能有数以千万计更小的颗粒，不能从地球上识别，比如螺栓、或冻结的发动机冷却剂的小块。
Atoms are made of neutrons, protons, and electrons. It was once thought neutrons, protons and electrons were fundamental particles. Fundamental particles can not be broken up into anything smaller.
原子由中子、质子与电子组成。质子和中子曾经一度被认为是基本粒子。所谓基本粒子就是指不可再分割成更小的东西。
They stop smaller particles, flow more oil and last longer than regular filters.
他们停止了更小的粒子，流更多的石油和最后一个过滤器超过正常。
All matter is composed of tiny particles called atoms, which are themselves composed of smaller particles, electrons, neutrons and protons.
所有的物质都是由称之为原子的微粒组成，而原子本身则由更小的微粒，电子、中子和质子所组成。
In some cities, measurements of even smaller particles such PM2.5 are available, and these are also included in the database.
某些城市的测量甚至包括PM 2.5等更小的微粒，这些也被收入数据库之内。
In some cities, measurements of even smaller particles such PM2.5 are available, and these are also included in the database.
某些城市的测量甚至包括PM 2.5等更小的微粒，这些也被收入数据库之内。
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