The phrase "acknowledges some challenges" is correct and usable in written English.
You can use it when discussing a situation or topic where difficulties or obstacles are recognized.
Example: "The report acknowledges some challenges faced by the organization in implementing the new policy."
Alternatives: "recognizes certain difficulties" or "addresses a few obstacles."
Although Whan will admit to facing a learning curve and acknowledge some challenges, he seems confident of where the tour is going.
The 2010 Pentagon budget acknowledges some of these challenges, calling for more spending on Afghanistan than Iraq for the first time since the US-led invasion of Iraq in 2003 and outlining some 50 programme changes to play up unconventional warfare capabilities.
Denton in his more reflective moments acknowledges some of the economic challenges he faces.
The World Diamond Council has announced corporate members will help boost the process's administrative capabilities while Shabangu acknowledged some of the challenges ahead but commended the "common understanding on the merging of certain structures within the Kimberley Process geared to enhance the effectiveness of our organisation".
He did, however, acknowledge some gay-specific challenges, likening his preparations for each year's banned demonstrations to a James Bond film: "We always have to use new tactics, we always have to invent some new strategies to bypass the bureaucrats".
As Gov. Jerry Brown touted California's environmental policies in Paris, he also acknowledged some of the steep challenges faced while expanding renewable energy.
It is important to acknowledge some of the ethical challenges this study brings.
Shah acknowledged some states and communities have challenged proposed legislation.
The appointment I had was to see my therapist -- someone who had only recently entered my life but had started to provide an important avenue for me to acknowledge and tackle some challenges I've lived with for as long as I can remember.
