lavish
发表于 2025-3-30 10:20:11
Europe and Its CitiesEurope is separated from the continent of Asia by the Ural mountains, the Caspian sea, Caucasus and the Black Sea. To the south, to the west and to the north Europe has coastlines to the Mediterranean sea, the Atlantic and the Polar sea, respectively. The continent extends from 37°N to 61°N.
Muffle
发表于 2025-3-30 13:40:43
Mobile SourcesEmissions from motor vehicles dominate to a very large extent the emissions over urban areas. From both an emissions and usage standpoint the following major motor vehicle categories have to be distinguished:
declamation
发表于 2025-3-30 20:27:28
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