The former is often deemed understandable, if not optimal, and the latter is seen as unforgivable.

人们通常认为前者是可以理解的，后者是不可原谅的。

youdao

This is by far the most frequently implemented Undo, and it is certainly adequate, if not optimal, for many programs.

这是到目前为止最常实现的撤销功能，并且对于大多数程序来说肯定够了，即使没有达到最好。

youdao

This is by far the most frequently implemented Undo, and it is certainly adequate , if not optimal, for many programs.

这是到目前为止最常实现的撤销功能，并且对于大多数程序来说肯定够了，即使没有达到最好。

youdao

Oddly, however, Mr Mundell very strongly believes that Europe is, in practice if not in theory, an optimal currency area.

ECONOMIST: Man of the hour | The

If you are not focused on optimal data mining and using all the latest data science tools, you are missing an important success factor.

FORBES: It's Your Data, Stupid

Given the high fixed cost base related to operating a steel mill, margins will also decline if a plant is not operated at optimal capacity.

FORBES: ArcelorMittal Still Good For $22 Even With Lower Guidance