| leach |
A sail is a surface intended to generate thrust by being placed in a wind; basically it is a vertically oriented wing. Depending on the incident angle of the wind on the surface of the sail, one side of the sail will have a higher air pressure than the other one according to Bernoulli's principle. The difference in pressure will generate lift, causing the sail to be pulled towards the side of lower pressure. ...
출처: en.wikipedia.org/wiki/Leach_(sail)
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| lead poisoning |
Lead poisoning is a condition, also known as plumbism or painter's colic, caused by increased levels of blood serum lead levels. The average person has less than 10 micrograms per deciliter, or 100 parts per billion, ppb, of lead in their blood serum. People who have been exposed to an unusual amount of lead will have lead serum levels higher than 200 ppb—most clinical symptoms of lead poisoning begin at around 100 ppb. ...
출처: en.wikipedia.org/wiki/Lead_poisoning
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| learning disability |
A learning disability exists when there is a significant discrepancy between one's ability and achievement. Usually this discrepancy equals a 1.5 standard deviation, typically 22 points between the IQ and an academic area such as math, reading, or written language. ...
출처: en.wikipedia.org/wiki/Learning_disability
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| learning disorder |
A learning disability exists when there is a significant discrepancy between one's ability and achievement. Usually this discrepancy equals a 1.5 standard deviation, typically 22 points between the IQ and an academic area such as math, reading, or written language. ...
출처: en.wikipedia.org/wiki/Learning_disorder
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| lead |
Lead is a chemical element in the periodic table that has the symbol Pb (L. Plumbum) and atomic number 82. A soft, heavy, toxic and malleable poor metal, lead is bluish white when freshly cut but tarnishes to dull gray when exposed to air. Lead is used in building construction, lead-acid batteries, bullets and shot, and is part of solder, pewter, and fusible alloys. Lead has the highest atomic number of all stable elements. ...
출처: en.wikipedia.org/wiki/Lead
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