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Wall , wall / wôl/ • n. a continuous vertical brick or stone structure that encloses or divides an area of land: a garden wall farmland traversed by dryston… Wailing Wall , Wailing Wall Wall of Antoninus , Antonine Wall. The second and more northerly of the two walls constructed across northern Britain by the Romans in the 2nd cent. On the death of Hadr… Space , Space is the three-dimensional extension in which all things exist and move. Intuitively, it feels that we live in an unchanging space. In this space… Flying Buttress , buttress. Pier-like projection of brick, masonry, or other material, built either in close connection with a wall needing extra stability, or standin… Extravehicular Activity (manned Space Flight) , Space Walks
A space walk, also known as extravehicular activity (EVA), is an activity or maneuver performed by an astronaut outside a spacecraft. Ast…
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