31.   Wireless service offers a way to improve this ratio in Mexico because it enables companies to sidestep the difficult terrain that impedes installation of traditional telephone lines.

32.   With a terrain difficult to negotiate and no public transportation, a growing number of frail, older people holed up in their houses need home-delivered meals.

33.   Paramilitary soldiers were combing the dense forest in the area for the militants and the difficult terrain of the border with Bangladesh had been sealed, PTI said.

34.   Policeman Arne Bjoerkaas said it could take a week or more to recover the bodies, because of the difficult terrain.

35.   Authorities said rescue aircraft had flown over the site four times but failed to spot the wreckage because of difficult terrain and bad weather.

36.   Besides facing influential people, Arkhom was confronted by difficult terrain.

37.   But aid groups have had limited access to the refugees because of security threats, the difficult terrain and harassment from rebels, Jessen-Petersen said.

38.   But they say their advance through difficult forested terrain and across rivers was being further slowed by seasonal rains.

39.   Competitors face difficult terrain, sudden climactic changes and low oxygen.

40.   Difficult terrain prevented vehicles from reaching the plateau north of Mut where the balloon landed.