It is difficult to estimate the rate of eye evolution because the fossil record, particularly of the Early Cambrian, is poor.

That important goal will be difficult to achieve, especially with militant extremists whose agenda is to derail the peace process.

After six years of war, it is difficult not to picture a country in total ruin when peace finally comes to Syria.

Given this situation, it is very difficult to determine what goes on at the airports in Somalia, in particular with regard to the shipment of arms and weapons.

As most operate clandestinely, they are difficult to spot, especially in States where the practice is prohibited.

That's hard to say.

It is difficult to translate a poem into another language.

It's hard to persuade Jonathan.

It is difficult to generalize.

The completion of that mission, however, is still a cause for concern, in particular since it is becoming increasingly difficult, as the two recent Security Council reports make clear, to foresee a completion date for the accomplishment of the Tribunal's mandate.

This problem is too difficult for me to solve.

We hardly ever see you around here.

It's hard being a parent.

Hard to believe, right?..

Yesterday was an indescribable day.

In the old days, before computers, it was hard to manage complex pricing or, for that matter, to reach the right customers with specific time based or location based offers.

It was difficult to remove the coffee stain.

It's going to be difficult for us to do that.

It is difficult to disagree with the protesters.

Hard to be Easing

For most countries there is one most effective tool available to the cartel prosecutor the dawn raid, or unannounced visit to the offices of suspected cartel operators for the purpose of seizing documentary or electronic evidence of a cartel agreement.

If current levels of low investment and high unemployment continue, especially in the more diversified economies, they may prove difficult to reverse when the social consequences become evident.

But it s hard to break our habits, our adult habits.

It's difficult for them to understand that they're going to die.

One can hardly change one's point of view.

There are some things that are difficult to translate.

Now we get to the hard part.

The answer is not hard to find.

This is hard for Islamist parties to accept.

And seeing them makes it harder to deny their humanity.

It is difficult to make a credible forecast.

Now, it's hard to do. It's hard to translate a fish form, because they're so beautiful perfect into a building or object like this.

Turkey s Balancing Act

Human trafficking is a difficult crime to fight, especially if the right practices to combat it are not properly put in place, and sex trafficking takes place in spite of a well developed anti trafficking system in the United States as well.

A particular attraction to criminals and terrorists is that record keeping is limited or in codes only understood by the operators themselves, making it difficult to reconstruct money trails in the event of an investigation.

What do we learn from this example? It s hard to say.

From this perspective, adjustment is hard to beat.

It is hard to believe it is almost Christmas.

It is difficult to translate a poem into another language.

That claim was even more far fetched.

The reason is not hard to fathom.

Is it difficult to rebuild an identity via external context?

It was difficult for observers to judge its actual membership.

In practice, it has been usually difficult to locate them.

This makes it difficult to link the obligation with a strict liability.