They could power electrically driven wheels, letting an aircraft taxi without using its main engines.
它们可以给电力驱动的起落架轮子动力，让飞机不用主引擎就能在地面滑行。
They would be built from shuttle booster rockets, fuel tanks and main engines, as well as moon rocket engines.
新型运载火箭将由飞船助推火箭、燃料箱、主发动机以及月球火箭发动机组成。
The sensor system is one of several that protect the shuttle's main engines by triggering their shut down if fuel runs unexpectedly low.
该传感器系统是数个保护航天飞机主引擎的系统之一，如果燃料过低，则该系统将触发关机。
They know that they are China's main engines of growth in a period of economic transition, which gives them considerable power.
他们清楚，他们才是中国经济转型阶段的主要增长引擎，这令他们拥有了相当大的影响力。
Moreover, construction has long been one of the economy's main engines, accounting for as much as a quarter of GDP growth until recently.
而且建筑行业一直是国家经济增长的主要引擎之一，直到最近仍占GDP增长的四分之一。
It is mainly used on board for starting main engines.
在船上主要用于启动主机。
This vessel is made of steel, catamaran, fore raked stem, transom stern, round bilge, fore raised deck, single open deck, double main engines, double propellers, double rudders.
本船为钢质双体船，前倾艏柱，方艉圆舭，艏升高甲板单层露天甲板，双主机双螺旋桨双舵。
This vessel is made of steel, catamaran, fore raked stem, transom stern, round bilge, fore raised deck, single open deck, double main engines, double propellers, double rudders.
本船为钢质双体船，前倾艏柱，方艉圆舭，艏升高甲板单层露天甲板，双主机双螺旋桨双舵。
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