11.   A stronger yen would hobble Japanese exporters, the main engine of the economy.

12.   But Discovery also features a direct link to the main AltaVista search engine on the Internet.

13.   But analysts like Roly Michelmore of Day Cutten Ltd., an Adelaide investment house, say the affluent countries of the West will be the main engines of growth.

14.   But the main engine is a plentiful pool of less-expensive workers.

15.   But the main engine is a plentiful pool of not too expensive workers.

16.   But the main engine is a plentiful pool of workers who are not too expensive, even those who are college-educated and highly skilled.

17.   But the software command to fire the main engine, which would have triggered the final launch sequence, never reached the rocket, Boeing said.

18.   Canoga Park is home of the Rocketdyne division, which builds the main engines for the Space Shuttle.

19.   Corporate earnings are closely followed because they, along with interest rates, are considered the main engines of the stock market.

20.   Does this mean that scientists hope someday to create a direct interface between a silicon chip and one of the main engines of thought?