Both industrial and photochemical smog combine man-made pollution with local weather and geography.

工业烟雾和光化学烟雾均结合了人为污染与当地天气和地理条件。

Photochemical smog is strongest in urban areas with calm winds and dry, warm, sunny weather.

光化学烟雾在风平浪静、干燥温暖、阳光充足城区最为强烈。

You'd see a cloud of photochemical smog covering the planet.

你会看到一团光化学烟雾笼罩着地球。

And what at that time was inorganic photochemistry.

当时研究机光化学。

Secondary pollutants found in photochemical smog can damage and weaken crops and decrease yield, making them more susceptible to insects.

光化学烟雾中二次污染物能损并削弱农作物， 减少产量，使其更易受虫侵袭。

The infrared radiation emitted from a mammalian body has low quantum energy, which makes any photochemical effect on a pigment extremely unlikely.

哺乳动物身体发出红外辐射具有较低量子能量，这使得对颜料产光化学效应可能性极小。

Photochemical smog and airborne particles from vehicle emissions affect many rapidly developing cities, from Mexico City and Santiago to New Delhi and Tehran.

光化学烟雾和车辆排放空气颗粒物影响了许多快速发展城市，从墨西哥城和圣地亚哥到新德里和德黑兰。

And while some ozone in the upper atmosphere helps shield us from ultraviolet rays, on the ground, this gas can form alongside secondary particles and create photochemical smog.

它们会发反应，形成臭氧。虽然高层大气中臭氧能帮我们阻挡紫外线，在地面，这类气体可能会和衍性粒子一起形成，产光化学烟雾。

It sounds paradoxical, because the idea behind this hypothesis is that the red pigment is made in autumn leaves to protect chlorophyll, the light-absorbing chemical, from too much light.

这听起来有些自相矛盾，因为这个假说背后理念，秋天树叶会制造红色色素，以保护叶绿素（一种吸光化学物质）免受过多光照。

Other researchers have also found some superacids that bond really well with nitrogen oxides, gases made of both nitrogen and oxygen that are released in car exhaust, become smog, and lead to acid rain.

另一些研究人员还发现一些超强酸与氮氧化物结合很好，汽车排放含氮和氧组成尾气会造成光化学烟雾污染，进一步形成酸雨。

First, we must verify the detection of phosphine itself, and then later, we would have to confirm that this gas is coming from life and not from some unexpected geological or photochemical process.

首先，我们必须验证磷化氢本身检测，然后我们还需要确认这种气体来自命体而非某些意外地质或光化学过程。