然而，主要的改善是将取代了以前笨重的发动机，它用于推动缠绕的滑轮和电缆从而使尾鳍的移动更加优雅。
However, the major improvement will be replacing the cumbersome motor-powered tangle of pulleys and cables previously used to move the tail fin with something more elegant.
二冲程发动机没有移动的阀，火花塞每次点火活塞到达循环顶端。
A two-stroke engine has no moving valves, and the spark plug fires each time the piston hits the top of its cycle.
牵牛星(altair)公司将空调系统从发动机分隔间移动到汽车顶部而找到了足够的空间。
Altair's found plenty of room by moving the air conditioning system from the engine bay to the roof.
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