Englishfor English speakers
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
distribution
Noun
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Distribution is sending or giving out things to several people, companies, places, etc.
The distribution of the mail was slowed by the snow storm.
The increase in profits was followed by a cash distribution to the investors.
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Distribution is the way that things are spread (often used in statistics).
The distribution of the new iPad was very fast because Apple had invested a lot on advertisement.
The distribution of power in the company is very narrow, with just a few managers controlling almost everything.
The test scores averaged 50% and had a normal distribution.