on a need-to-know basis
US /ɒn ə niːd tə noʊ ˈbeɪsɪs/
UK /ɒn ə niːd tə noʊ ˈbeɪsɪs/
1.
按需知原则, 只告诉必要信息
only telling people information that they need to know and not telling them anything else
:
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Access to the confidential files is strictly on a need-to-know basis.
对机密文件的访问严格按需知原则进行。
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We'll share information with you on a need-to-know basis as the project progresses.
随着项目进展，我们将按需知原则与您分享信息。