Englishfor English speakers
emergency
Noun
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An emergency is a serious situation that needs to be dealt with very quickly.
She called 911 to report the emergency to police.
With the new fighting, the president has declared a state of emergency.
He was rushed to the emergency room where doctors operated to save his life.
Some airlines failed to show pilots how to operate emergency exits.
In an emergency, please close your doors and windows and stay calm.
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Emergency is the department in a hospital that takes people with immediate medial needs.
operation
Noun
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An operation is a medical process, often opening the human body.
The doctors performed the operation in three hours.
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An operation is an action of a group of people working for a goal (often military).
The Army operation was a success.
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An operation is part or all of a business. small(often plural)/small
The company's East Coast operation was bigger than its West Coast operation.
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An operation is a symbol that is used to perform a specific operation (addition, subtraction, multiplication or division) in maths.
The plus symbol is used to perform a specific operation in maths which is addition.