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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
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There is a clear link between exposure to radiation and some forms of cancer.
Some workers at the power station were exposed to high levels of radiation.
This is the British English definition of radiation. View American English definition of radiation.