| 单词 | 747s | 
| 释义 | 747s1) An airplane made by Boeing, competetor of Airbus.  It is the fastest subsonic jet in the world, crusing at .855 Mach, or 85% of the speed of sound.  The 747-400 can seat up to 630 passengers.  It has 4 engines; however, it can still fly with only two operational engines.  It is used for international flights. > 1) When we flew from San Francisco to Taipei, we flew on a 747-400. | 
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