made necessary by particular circumstances or regulations
必需的,必要的
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the application will not be processed until the requisite fee is paid .必要的费用付讫后,才会受理申请。
a thing that is necessary for the achievement of a specified end
必需品,必要条件
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she believed privacy to be a requisite for a peaceful life .她认为隐私是平静生活的必要条件。
"late Middle English: from Latin