1.   A ceasefire in the region is an essential part of any peace process.

2.   Again, as we will see, this kind of manoeuvre plays an essential part in the Roslin cloning procedure.

3.   An essential part of its history is that of ships, convoys and the conquest of distant oceans.

4.   Careful instruction in the use of metered dose inhalers is an essential part of educating asthmatic patients.

5.   Cristofori and Walter Both the action of Cristofori and that of Walter have four essential parts.

6.   For many courses a formal interview is an essential part of the selection procedure.

7.   For people with mental health problems, a sympathetic ear and understanding is an essential part of their rehabilitation.

8.   From the start, the physical setting was an essential part of the Black Mountain experience.

9.   It was an essential part of the peace settlement package but has a wider significance than just between the parties.

10.   Learning pro-social behaviour is an essential part of controlling aggressive and violent reactions.