The phrase "a main obstacle" is correct and usable in written English.
It can be used to refer to a significant barrier or challenge that hinders progress in a particular context.
Example: "The lack of funding is a main obstacle to the project's success."
Alternatives: "a primary hurdle" or "a key barrier".
While the reluctance to cut farm subsidies in Europe and the United States had been a main obstacle, the big developing countries also bear a lot of responsibility.
Finding financing is a main obstacle even though Myanmar's education spending has almost tripled from $340 million in 2011 to $1 billion in the current budget.
Democrats have unleashed a blistering attack on private health insurers as they try to convince the vast majority of Americans who already have coverage that the current system is tilted in favor of corporate profits, not patients, and that insurers are a main obstacle to passing legislation.
MANILA — In a landmark decision, the Supreme Court in the Philippines ruled unanimously on Tuesday to break up the rambling estate owned by the family of President Benigno S. Aquino III, parceling out land to more than 6,000 farmers and their families and removing a main obstacle to ending the oppressive plantation culture that has dominated the country for decades.
This can be a main obstacle for achieving efficient coding schemes.
However, low power density is considered as a main obstacle for LT-SOFCs.
However, in the UK, a remaining main obstacle has been the excessive requirements and attendant delays involved in obtaining these data.
Since 2005, Francis has at various times stated that the Pixies recording a new studio album was either a possibility, or an unlikelihood, the main obstacle being Deal's reluctance to do so.
Light-induced degradation of hydrogenated amorphous silicon (a-Si H) is the ma-Si Hstacle for commercisl use in solar cells.
But, at home, he has not made it a priority.The main obstacle in curbing the spread is not technical, but cultural: the tyranny, familiar across Africa, of denial and taboo.
In creating this new production, the director John La Bouchardière thought that the tendency of audiences to "spectate," as he puts it in a program note, was the main obstacle to fostering a connection with "The Blind".
