| water table |
The level of ground water. The upper surface of the zone of saturation of groundwater above an impermeable layer of soil or rock (through which water cannot move) as in an unconfined aquifer. This level can be very near the surface of the ground or far below it.
출처: www.nsc.org/ehc/glossar2.htm
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| watchful waiting |
Careful observation without immediate treatment.
출처: my.webmd.com/content/article/46/2953_489.htm
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| watershed |
The land area that drains water to a particular stream, river, or lake. It is a land feature that can be identified by tracing a line along the highest elevations between two areas on a map, often a ridge. Large watersheds, like the Mississippi River basin contain thousands of smaller watersheds.
출처: www.msnucleus.org/membership/html/jh/earth/diction...
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| watt |
A watt is a unit of power equal to one joule of energy per second. The watt was named for the Scottish engineer and inventor James Watt (1736-1819). WAVE A wave is an energy-carrying disturbance that moves through space. Some examples of waves are waves in water, sound waves, and light waves.
출처: www.enchantedlearning.com/subjects/astronomy/gloss...
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| watchful waiting |
no treatment, but your doctor tests periodically to see if the cancer is growing. Suggested for:
출처: www.womenandinfants.com/body.cfm
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