41.  The food stamp bill is part of an ambitious Republican effort to limit the growth of welfare spending and free poor people from dependence on government.

42.  The initial success and experience gained with the plant pathogen projects has led to more ambitious efforts.

43.  The most ambitious effort appeared to be Manhattan Cruises, a firm created by the backers of the Foxwoods Casino.

44.  The most striking drops are coming in northern Brooklyn, where the police have begun an ambitious anti-drug effort by flooding the high-crime neighborhoods there with officers.

45.  The most ambitious scholarly effort in the field was undertaken by the photographic historian Naomi Rosenblum.

46.  The new venture marks the most ambitious effort yet to act on the promised convergence between telephone and cable television networks.

47.  The results of the latest and in some ways the most ambitious effort to place a dollar value on natural capital and services were announced last week.

48.  The Starbright World network is by far the most ambitious effort.

49.  The Sloan survey is an ambitious effort to collect and categorize hundreds of millions of objects over a vast swath of the northern sky.

50.  The technical substance of health policy and the politics of the issue are so complex that they frustrate such ambitious efforts.