那实际上是一辆后面有汽油发动机的三轮车。
三个发动机安装在机身后面，与机身平齐。
This means the wings can be thinner, saving weight. The three engines are mounted at the rear, flush with the fuselage.
原先处在第二位的那辆赛车由于发动机发生故障而落在了后面。
The car that had been in the second position dropped back with engine trouble.
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