Englishfor English speakers
exploitation
Noun
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Exploitation is the use of something, usually for profit.
The commercial exploitation of Alaska for oil could lead to serious environmental problems.
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Exploitation is the use or treatment of someone unfairly.
Today, most countries have laws against the exploitation of children in factories.
of
Preposition
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Made using.
It is a house of cards.
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.
patent
Noun
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A patent is a way of protecting an invention from being stolen.
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Thomas Edison had over 2000 patents.
patent
Verb
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To patent means to get a patent on an invention
Thomas Edison patented the light bulb and the phonograph.