Englishfor English speakers
f
Noun
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F is the sixth letter of the alphabet.
"e" comes before "f"
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In some schools, an F is a grade that shows that you have failed completely.
This student has not made any attempt in the exam; he only got an F.
center
Noun
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The center of something, is the place that is as far from its outside as possible.
The president and his problems continue to take center stage in the news.
She placed a flowers at the center of the table and then hurried off.
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A center is a building, area, or group of people with a particular purpose.
They have opened a large shopping center in Taipei.
The team was staying at the US Olympic training center.
Recently, Bahrain has become a major international banking center.
Scientists at the Center for Disease Control have found a new virus.
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The town center is the place in the town where most of the shops are.
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In politics, the center is the position that is not politically right or left.
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In sports, a center is a player who plays in the middle of the field, usually an attacker.
center
Verb
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If you center something, you move it towards the center.
laser
Noun
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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
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The term laser originated as an acronym for "light amplification by stimulated emission of radiation".