It is a difficult problem.

Doctors have a difficult problem.

It's not that hard a problem.

How is this a hard problem?

And this is not a difficult problem to fix.

Loss of memory is not a difficult problem.

Any tough problem, I think it can be solved.

This was a very difficult problem originaly.

However, banditry continues to be a difficult problem for the convoys.

And the answer is we're doing extremely poorly it's a very hard problem.

So this is about as hard up to this point as you'll see an inverse Laplace transform problem.

It's a hard problem because the water sloshes about, but it can do it.

So let me give you one very easy problem, a second very easy problem and then a third, hard, problem.

And as it turns out, that's a really hard problem, because you have to build a small, portable robot that's not only really affordable, but it has to be something that people actually want to take home and have around their kids.

You probably see the sense of urgency, a little bit of fear, but intense concentration, deep, deep focus on tackling a really difficult problem.

Come to think of it, knowing when you're wrong without a teacher, or your mother, telling you, is a very hard problem.

She is becoming impossible, simply impossible.

This is hard.

Tough?

And this is a very challenging idea. It's a very challenging idea to mainstream media.

But like every scientist, she appreciated that to make her mark, what she needed to do was find a hard problem and solve it.

The navigation is difficult.

little bit difficult.

Very tough.

My language is very complicated.

My life is so hard.

Is Arabic difficult?

My life is very difficult to manage.

Those are really tough.

Very very hard.

Such changes are difficult.

Very, very hard.

I have a very difficult task.

Your dramas are too difficult. Yes, your shit was this thick. Yang Soo Kyung, Yang Soo Kyung

It's an uphill climb

Disadvantage farming is hard.

Probably because it's so hard. Ah.

Those are tough questions.

A no brainer.

That's a hard one.

Tremendously challenging.

It's just too tough.

Some of this stuff is hard.

Not a challenging task.

Tough night, huh?