In so doing, Administration officials still face a number of obstacles.

How does he get around in a world full of obstacles, both physical and social?

I think there were a lot of obstacles in the way.

A number of obstacles face the player in each level.

"He told me not to run any of the obstacles."

There will be a lot of obstacles, but you try to reach them.

"What we're saying is that we have a lot of obstacles to get over first."

Of all the obstacles to learning, perhaps the greatest is the way in which we approach practice.

By the time the period was over, they had completed only four of the five obstacles.

One of the greatest obstacles to the program could be political.