Englishfor English speakers
sample
Noun
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A sample is a small amount of something to try or test it.
The nurse took a small blood sample.
The data come from a study of a random sample of adult (aged 15 and over) deaths.
sample
Verb
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If you sample something, you try or test a small amount of it.
After sampling each of the wines, she bought the one she liked best.
basis
Noun
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The basis of something, is the main ideas or parts that it is built on.
On the basis of the information available, we have decided to cancel the project.
There is no basis for believing that he was killed.
Her experiences in Cambodia formed the basis for her first book.
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If something happens on a regular/daily/weekly etc. basis, it happens regularly, daily, etc.
The problems are now happening on a very regular basis.
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If we are on a first-name basis, we use first names when speaking to each other.
Josie Parkinson and I are on a first-name basis. I call her "Josie" when I see her.