Level
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Level can have different meanings:
- Originally, a level was a tool which allowed someone (usually a construction worker) to see if a surface was flat.
- it then came to mean a flat surface.
- then people used it to say somebody has a certain degree of knowledge or skill.
- it can also mean the difficulty of something
- in videogames, a level is a place the player must get through without losing to advance to the next one.
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A water level (a tool used by construction workers)
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Close up, showing a bulb of air. This bulb indicates if a surface is flat.
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How this works. On a flat surface (above), the bulb will be in the middle position. On a surface that is not flat, but bent one way or the other, the bulb of air will not be in the middle (below).
