The phrase "holds within" is grammatically correct and can be used in written English.
For example, "This small box holds within a world of secrets."
This very moment holds within it two thousand years of history.
The pattern also holds within different regions of individual countries, and it persists over time.
"Mrs Brown", the Los Angeles housewife, holds within her unspeakable dreams of non-being, of suicide.
Each of these public spaces also holds within them something less tangible: a potential to transform.
Relationship between activity inequality and obesity holds within countries of similar income.
Relationship between walkability and activity inequality holds within cities in the USA of similar income.
As a worldwide average, the expression s1 MS 1/8 = 1 holds within 1%.
But each religion, because of its metaphorical ambiguity and intellectual subtlety, holds within it marvelous potential for development and adaptation.
If we say the objective is "raising standards", that holds within the phrase a sense of "raising standards for all".
It's almost impossible to separate Greenfield's analysis of our society from the champagne-clutching position she holds within it.
"This work and our study are some of the first attempts to show this holds within species as well as between species.
