21.   And the supercharger does nothing to improve the already middling fuel economy.

22.   And they deliver decent fuel economy while serving as family transport.

23.   As for the fuel economy, or lack thereof, Ford officials said they would have to get back to us on that.

24.   As sport utilities have soared in popularity, the average fuel economy of new vehicles has fallen steadily in recent years.

25.   As a result, the latest trend in the market appears unlikely to do as much as expected to improve the worsening fuel economy of American vehicles.

26.   As a truck, the Escalade is subject to less stringent rules on safety, emissions and fuel economy.

27.   As with the Japanese entries, the result is better fuel economy.

28.   As the popularity of sport utility vehicles rises, the average fuel economy for motor vehicles drops.

29.   At the moment, falling fuel prices are encouraging Americans to drive more and worry less about fuel economy.

30.   Automotive stylists are constrained by the search for fuel economy.

n. + economy >>共 313
market 28.36%
world 22.88%
fuel 8.00%
free-market 2.72%
member 2.18%
year 2.15%
command 1.87%
farm 1.50%
high-tech 1.29%
service 1.12%
fuel + n. >>共 571
price 11.94%
cost 5.29%
economy 5.03%
shortage 3.83%
depot 3.72%
supply 3.60%
efficiency 3.04%
tax 2.50%
standard 2.35%
consumption 2.27%
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