But many economists questioned whether unforeseen obstacles would prevent the bank's establishment so soon.

The city's Olympic bid is only one example of large-scale projects here that are facing unforeseen obstacles.

Barring some unforeseen obstacle, they could munch their way clear to the first frost.

Several times he seemed near daylight, only to be set back by some unforeseen obstacle.

But, in fact, an ant will usually encounter unforeseen and unforeseeable obstacles as it makes its way along from one point to another.

Which of course is precisely what people can do so much better than machines: find ways around unforeseen obstacles.

Even with a couple of unforeseen obstacles, he should have a good five hours of oxygen to spare.

Two people going will have a better chance than one of overcoming unforeseen obstacles.

"The economy is undoubtedly on a prosperous path; it's just that some unforeseen obstacles have surfaced in recent weeks."

If there is no new, as yet unforeseen obstacle, the accord seems likely to end a controversy that has raged since 1992.