Sentence examples for are difficult to crack from inspiring English sources

Most of this so-called fresh material is circulated only in children pornography rings that are difficult to crack, the authorities say.

Elisabetta Visalberghi of the Institute of Cognitive Sciences and Technologies of the National Research Council in Rome and colleagues studied a group of the monkeys in Brazil that was discovered in 2003 to use stones as hammers to open palm nuts, which are difficult to crack.

By contrast, the cycle oil contains a large amount of aromatics, which are difficult to crack.

This is because, LSRN is made up of mainly C5 C6 molecules and are difficult to crack compared to HSRN which is made up of mainly C6 C11.

This is because gasoline olefins with a carbon number of seven or higher are easy to crack, while pentene and hexene are difficult to crack under conventional FCC operating conditions [12, 13, 14, 15].

Make sure you choose a password that's difficult to crack!

In part, that is because some diseases are proving to be difficult to crack.

Even with the best of will, this problem is difficult to crack.

Sjugirov chose the Caro-Kann Defense, which can be difficult to crack.

He said: "It's difficult to crack down on synthetic cannabinoids in terms of regulation.

A personal recommendation can also help you enter a field that's difficult to crack.