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The site shows example sentences for English words. How the word or phrase could be used in a sentence?
" ... 3. Caffeine - caffeine has a 6-hour half-life in your body so your 1/2 of your 3PM coffee is still in your system at 9PM and 1/4 is still there at 3AM. This leads to insomnia, waking up in the middle of the night, and waking up unrested. ... "