実じっ際さい面めんで

expression

in practical terms; from a practical standpoint

Used to shift focus from theory to real-world application or concrete aspects.

• 実じっ際さい面めんで、この計けい画かくには多おおくの問もん題だいがある。

  In practical terms, this plan has many problems.

• 理り論ろんは正ただしいが、実じっ際さい面めんでは難むずかしい。

  The theory is correct, but it's difficult in practice.