need-to-know

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌneed-to-ˈknow adjective  on a need-to-know basis if information is given to people on a need-to-know basis, they are given only the details that they need at the time when they need them 按需要知晓原则 Access to the manufacturing process is on a strictly need-to-know basis. 如非必要，生产过程绝不外泄。

ˌneed-to-ˈknow adjectiveChineseSyllable  

need-to-know
ˌneed-to-ˈknow adjective
on a need-to-know basis if information is given to people on a need-to-know basis, they are given only the details that they need at the time when they need them:
    Access to the manufacturing process is on a strictly need-to-know basis.

need-to-knowBrE /ˌniːd tə ˈnəʊ/ 🔊NAmE /ˌniːd tə ˈnoʊ/ 🔊 adjective●on a ˌneed-to-ˈknow basiswith people being told only the things they need to know when they need to know them, and no more than that 仅限于人们需要知道的范围◆Information will be released strictly on a need-to-know basis. 资讯发布将严格限制在人们需要知道的范围之内。🔊🔊