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.
rate
Noun
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Speed. A rate is how fast something happens. Something can go at a fast rate or a slow rate.
The rate of water pouring out of the lake into the river is enough to make the lake empty in a year if it doesn't rain.
Her heart rate is 70 beats every minute.
If we keep writing pages at this rate we might have 2000 Simple English Wiktionary words by August 4.
rate
Verb
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Someone rates something when they decide how much its value is (how much it's worth).
I rate this book at six out of ten: it was not the best book.