Science wallpaper on Desktop / page 47

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Vector image for desktop

Fancy graffiti for the desktop

Nusaiba reaches for the bear

Mac icon in space on the background of the earth

Mac icon in space on the background of the Earth

Energetic desktop screensaver

Water droplets on the glass with blurred lights

The iron warrior is preparing for battle

The Iron Warrior is preparing for battle

Christmas tree on the city square , decorated with toys and garlands

Enlarged blood cells created using 3d graphics

Enlarged blood cells created using 3D graphics

A black foreign car in the dark

Space patrol on the background of the earth

Automatic machine on the starry sky map

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Система знаний о закономерностях в развитии природы, общества и мышления, а также отдельная отрасль таких знаний. То, что поучает, даёт опыт, урок (в 4 знач.; разг. ).