necessary connection

基本解释

And that's the only kind of necessary connection there is.
而且也是唯一的必要关联。
There is an intrinsic and necessary connection between the market profit rate and the macro-economy.
市盈率与宏观经济形势之间存在着内在的、必然的联系。
THEREFORE: since these always carry a necessity with them, experience is only possible through a representation of necessary connection of perceptions.
既然这些概念在任何时候都带有必然性，所以经验就惟有通过知觉的必然结合的表象才是可能的。

This raises a question. Whether the relation between contemporary political science and liberalism is merely accidental or whether there is some intrinsic some necessary connection between them.
这导出一个问题，当代政治科学,与自由主义的关系仅是偶然,或之间，有些本质的,一些必然的,连结介于两者之间。
耶鲁公开课 - 政治哲学导论课程节选

Lynch warned against making a necessary connection between QE and the value of the yen.
FORBES
Tiki's cable-free design allows for direct connection to a USB port, while the included docking cable provides extended connection where necessary.
ENGADGET: Blue Microphones Tiki USB mic now available at Best Buy, coming to Apple stores July 15th