The phrase "a big obstacle of" is not correct in standard written English.
It is typically used to describe a significant barrier or challenge related to a specific subject or situation.
Example: "The lack of funding is a big obstacle of our project’s success."
Alternatives: "a major hurdle in" or "a significant barrier to".
The main gap seems to be the thing about the fence: apparently the double fence at the Emmitsburg Road was a big obstacle on the left wing of the attack (Trimble and Pettigrew), where in fact the attack stopped dead right there; on Pickett's wing, the fence was much further back and wasn't a big deal.
In June last year Chilcot announced he was satisfied that the "gist" of talks between Blair and Bush could be made public, removing a big obstacle to publication of his report.
But they are a big obstacle to hopes of improving relations with Arab allies.
An editorial on BearingArms.com, a pro-gun website, in August called smart guns "a dumb idea" and said the ability to disable them was a "technology for tyrants" that would give governments a monopoly on the use of force.Such concerns present a big obstacle to the adoption of smart firearms.
One use of such a bank, the firm suggests, could be the rapid charging of electric cars which would, of course, also be fitted with capacitors.That would remove a big obstacle to the adoption of electric vehicles in general that it takes so long to refuel them.
High taxes on labour, plus onerous welfare benefits, are a big obstacle to the creation of new jobs.
The conflicting advice being presented to President Bush remains a big obstacle to the passage of a bill that several lawmakers are preparing to introduce shortly, in the hopes of getting final passage before Congress goes into recess in a few weeks.
People's lack of knowledge about the importance of vaccinations, proper hygiene behaviour, nutrition and other health related issues keeps being a big obstacle for the success of many health interventions.
Yet, marking two years of this government's tenure late last month, the finance minister, Palaniappan Chidambaram, singled out financial-sector reform as essential if India is to achieve its aim of sustaining economic growth of 7-8% a year.He identified a shortage of credit as a big obstacle to growth and a shortage of capital in the banking system as the biggest constraint to increasing credit.
A big obstacle for Aramark is the lack of partnership and acquisition opportunities in Europe.
