Englishfor English speakers
environment
Noun
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The environment is the natural world: forests, rivers, grasslands, oceans, etc.
We have to do more to protect the environment from pollution.
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Your environment is the situation or area that you live, work, or spend time in, including the people, buildings, vehicles, etc.
When we moved to the city, we found ourselves in a comepletely new social environment.
This course will prepare students for a career in a software engineering environment in industry or research.
The learning environment can have a large effect on your grades.
proof
Noun
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Proof is evidence which shows something is correct.
He has proof that he was not at the crime scene. A witness says that they were somewhere else.
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A proof can show how a theorem is correct.