Englishfor English speakers
calendar
Noun
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A calendar is a system of measuring time.
The Chinese new year is different from the western new year because the Chinese use a lunar calendar.
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A calendar is list of all the days with their dates, usually for one full year.
Write his birthday on the calendar hanging on the wall.
revision
Noun
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A revision is a change or edit a to language, a plan, etc.
This book needs a lot of revision before it can be published.
She revised what she said so that she was not saying something bad about him.
The plan has undergone a number of complete revisions.
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A revision is a piece of writing or plan that has changed or will change.
The software includes the latest revisions to the HTML standards.
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In the UK, revision is the process of studying something again.
I need to do more revision for the test.