Air pollution in the city had reached four times the acceptable levels.

这座城市空气污染程度曾高达可接受四倍。

Aerial pollution is a problem that should be solved quickly.

空气污染是一个亟待解决问题。

There are many sources of air pollution; exhaust fumes, for example.

空气污染有许多来源, 例如废气。

California's air pollution guidelines are stringent.

加州制定空气污染很严格。

Heliodon Sky Vault: 3D sky based on 24 hours, clouds, pollution effects.

3D天空光照是建立在24小时(时间调整)、云彩和空气污染效果基础上。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤型”、“光化型”污染后，现代人正进入以“室内空气污染”为志第三代污染时期。

Air pollution in the city had reached four times the acceptable levels.

城市的空气程度曾高达可接受准的四倍。

Aerial pollution is a problem that should be solved quickly.

空气是一个亟待解决的问题。

There are many sources of air pollution; exhaust fumes, for example.

空气有许多来源, 例如废气。

California's air pollution guidelines are stringent.

加州制定的空气准很严格。

Heliodon Sky Vault: 3D sky based on 24 hours, clouds, pollution effects.

3D天空光照是建立在24小时(时间调整)、云彩和空气效果的基础上的。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤烟型”、“光化学烟雾型”后，现代人正进入以“室内空气”志的第三代时期。

Air pollution in the city had reached four times the acceptable levels.

这座城市的空气污曾高达可接受准的四倍。

Aerial pollution is a problem that should be solved quickly.

空气污是一个亟待解决的问题。

There are many sources of air pollution; exhaust fumes, for example.

空气污有许多来源, 例如废气。

California's air pollution guidelines are stringent.

加州制定的空气污准很严格。

Heliodon Sky Vault: 3D sky based on 24 hours, clouds, pollution effects.

3D天空光照是建立在24小时(时间调整)、云彩和空气污效果的基础上的。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤烟型”、“光化学烟雾型”污后，现代入以“室内空气污”为志的第三代污时期。

Air pollution in the city had reached four times the acceptable levels.

这座城市的空气污染程度曾高达可接受准的四倍。

Aerial pollution is a problem that should be solved quickly.

空气污染是一个亟待解决的问题。

There are many sources of air pollution; exhaust fumes, for example.

空气污染有许多, 如废气。

California's air pollution guidelines are stringent.

加州制定的空气污染准很严格。

Heliodon Sky Vault: 3D sky based on 24 hours, clouds, pollution effects.

3D天空光照是建立在24(间调整)、云彩和空气污染效果的基础上的。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤烟型”、“光化学烟雾型”污染后，现代人正进入以“室内空气污染”为志的第三代污染期。

Air pollution in the city had reached four times the acceptable levels.

这座城市气污染程度曾高达可接受准四倍。

Aerial pollution is a problem that should be solved quickly.

气污染是一个亟待解决问题。

There are many sources of air pollution; exhaust fumes, for example.

气污染有许多来源, 例如废气。

California's air pollution guidelines are stringent.

加州气污染准很严格。

Heliodon Sky Vault: 3D sky based on 24 hours, clouds, pollution effects.

3D照是建立在24小时(时间调整)、云彩和气污染效果基础上。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤烟型”、“化学烟雾型”污染后，现代人正进入以“室内气污染”为志第三代污染时期。

Air pollution in the city had reached four times the acceptable levels.

这座城市的空气污染程达可接受准的四倍。

Aerial pollution is a problem that should be solved quickly.

空气污染是一个亟待解决的问题。

There are many sources of air pollution; exhaust fumes, for example.

空气污染有许多来源, 例如废气。

California's air pollution guidelines are stringent.

加州制定的空气污染准很严格。

Heliodon Sky Vault: 3D sky based on 24 hours, clouds, pollution effects.

3D天空光照是建立在24小时(时间调整)、云彩和空气污染效果的基础上的。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤烟型”、“光化学烟雾型”污染后，正进入以“室内空气污染”为志的第三污染时期。

Air pollution in the city had reached four times the acceptable levels.

这座城市污染程度曾高达可接受准四倍。

Aerial pollution is a problem that should be solved quickly.

污染是一个亟待解决问题。

There are many sources of air pollution; exhaust fumes, for example.

污染有许多来源, 例如废。

California's air pollution guidelines are stringent.

加州制定污染准很严格。

Heliodon Sky Vault: 3D sky based on 24 hours, clouds, pollution effects.

3D天光照是建立在24小时(时间调整)、云彩和污染效果基础上。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤烟型”、“光化学烟雾型”污染后，现代人正进入“污染”为志第三代污染时期。

Air pollution in the city had reached four times the acceptable levels.

这座城市的染程度曾高达可接受准的四倍。

Aerial pollution is a problem that should be solved quickly.

染是一个亟待解决的问题。

There are many sources of air pollution; exhaust fumes, for example.

染有许多来源, 例如废。

California's air pollution guidelines are stringent.

加州制定的染准很严格。

Heliodon Sky Vault: 3D sky based on 24 hours, clouds, pollution effects.

3D天光照是建立在24小时(时间调整)、云彩和染效果的基础上的。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤烟型”、“光化学烟雾型”染后，现代人正进“内染”为志的第三代染时期。

Air pollution in the city had reached four times the acceptable levels.

这座城市的空气污程度曾高达可接受准的四倍。

Aerial pollution is a problem that should be solved quickly.

空气污是一个亟待解决的问题。

There are many sources of air pollution; exhaust fumes, for example.

空气污有多来源, 例如废气。

California's air pollution guidelines are stringent.

加州制定的空气污准很严格。

Heliodon Sky Vault: 3D sky based on 24 hours, clouds, pollution effects.

3D天空光照是建立在24小时(时间)、彩和空气污效果的基础上的。

Afterwards " fuliginous model " , " photochemical smog " after pollution, modern is being entered with " indoor air is polluted " the 3rd generation that is a mark pollutes period.

继“煤烟型”、“光化学烟雾型”污后，现代人正进入以“室内空气污”为志的第三代污时期。