Englishfor English speakers
theoretical
Adjective
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Theoretical is about theory rather than its practical application.
Entanglement is important but difficult to study, both in terms of a theoretical understanding and doing experiments.
air
Noun
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Air is a mixture of gases. It has no color or odor (smell)
We breathe air to live.
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You put on airs when you act arrogantly.
The woman put on the airs in front of her friends.
air
Verb
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If you air something, you broadcast it, either over the radio, or on television.
Hurry! You'll miss the story about homeless children that is about to air on the local news!