B2 something that you must do, or something you need需要;有赖于;要求;规定
More examples
There is a residency requirement for obtaining citizenship.
The government estimates that its borrowing requirement this year could reach £150 billion, subject to a wide margin of error.
Do you have any special dietary requirements?
One of the requirements of the job is fluency in two or more African languages.
We haven't yet been able to find a house that meets our requirements.
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