21.   Government officials have voiced hope that private demand, including consumer spending and capital investment, will become the main engine of the recovery.

22.   Having more fuel will make it easier for the shuttle to deal with any unexpected thrust shortfalls in its three main engines, they say.

23.   It has worried especially about the skittish main engines, whose dangers have been recognized for more than a decade.

24.   Japan, once the main engine of Asian prosperity, now threatens to drag its neighbors and itself into prolonged recession.

25.   Japan has depended on growing foreign demand for its exports as a main engine of recovery.

26.   Next week, Endeavour will be towed to the massive Vehicle Assembly Building here, so that its main engines can be replaced.

27.   Rocketdyne also builds the Space Shuttle main engine.

28.   She called her students just before the shuttle fired up its main engines.

29.   That puts him on the right of the Latin American political spectrum where the tradition of the state as the main engine of economic development remains strong.

30.   The cracks were found in metal liners inside fuel pipes for the main engines, spokesmen said.