Sentence examples for an intractable challenge from inspiring English sources

Despite the mounting pressure on Isis in recent weeks, its grip on the two cities remains unrelenting, posing an intractable challenge to forces seeking to liberate them.

"Yet obtaining a little extra money to bring in a lot of extra money remains an intractable challenge for the I.R.S., and that is unfortunate," the report said.

Yet the engineering of functionally appropriate human-device interfaces represents an intractable challenge in the field.

Meniscal injury is one of the most common knee joint injuries, which remains an intractable challenge in clinical practice to date.

The rising empowerment of tech-savvy groups or individuals with bio and cybertechnology will pose an intractable challenge to governments and aggravate the tension between freedom, privacy and security.

But as NASCAR reaches the midpoint of another season — the Brickyard 400 at Indianapolis Motor Speedway is July 27 — France faces what might be an intractable challenge: NASCAR's popularity has flat-lined.

Most experts in drug treatment condemn this approach as a primitive, brutal and ineffective way to address the problem, saying that addiction is a much more complex and intractable challenge and that simply drying out cannot bring a lasting cure.

Finding ways to mitigate this problem has been a surprisingly difficult, and so far intractable, challenge.

An even subtler and more intractable challenge is identifying bees once they've been collected.

Faced with an intractable security challenge, both politicians and ordinary people "want to 'do something,' " Mr. Zenko said.

He's a former high school principal and so would understand the seemingly intractable challenge of fixing failing neighborhood high schools.