The phrase "complexity to understand" is correct and usable in written English.
You can use it to describe something that is difficult or complicated to understand. For example, you could say "This scientific theory has a certain complexity to understand, even for experienced researchers."
However, using this approach, we are not able to differentiate between the signal propagation, the noise effects, and the external interference, which introduces an unnecessary complexity to understand the results, as we can simply avoid by developing an independent module.
Rudy Giuliani and many current Republican presidential hopefuls seem to lack both the mental complexity to understand the international dimensions of the presidency and the moral courage to refrain from easy yet counterproductive, rhetoric.
"There's always been an attempt to reduce complexity to understand it better, but I think we can actually embrace complexity, and instead of having a big picture, find a good way to navigate the complexity, where you always are somewhere, and there are other places where you can go from there..
We study several specific models with increasing complexity, to understand the mechanisms behind gradient formation.
We may have to consider this complexity to understand concentration adjustments in biological cells.
The arrows in this figure indicate how the eDESDE-LTC coding reduces the complexity to understand and manage decimal identifiers and descriptors.
A growing literature illustrates the relevance of complexity science to understand family practice offices as complex adaptive systems [ 21, 22].
Researchers recognize that a multiscale approach is required to elucidate the spatiotemporal components of ecosystem complexity and to understand animal movement patterns in natural landscapes.
Categorising individuals' accounts may help to impose structure on their complexity and to understand how spirituality is expressed.
Any amateur reader of complexity science comes to understand that clustering of big storms like this cannot, scientifically, be interpreted as significant by itself.
He returns to the matter of chance like a koan, and sees that "randomness can be complexity too deep to understand".
