be a matter of principle的意思|示意

The principle of common evidence needs to give a same judgment for the same facts, the evidence no matter who presentes can be used as a basis for adjudication.

证据共通原则要求法官对同一事实作出相一致的认定，无论是谁提出的证据，不管有利还是不利都可以作为认定事实的依据。

We know as a matter of principle that these concerns are misplaced: if there were a shortage of savings, the economy wouldn't be depressed.

据于理吾知彼忧心之枉置矣：若储蓄不足，则经济必不至低落。