这辆汽车是由一个四缸气冷式发动机驱动的。
它要么是由发动机驱动的，要么是由收割者自己提供动力。
It is either engine driven, or powered by the harvestors themselves.
这艘船是由两台功率很大的发动机驱动的。
火箭又长又细，上部有点粗，因为它的第二级比固体燃料火箭发动机驱动的第一级要厚。
The rocket is long and slender, and fatter on top because its second stage is thicker than its solid rocket motor-powered first stage.
一台草坪打孔机具有一系列打孔针组，这些打孔针组沿着由发动机驱动的轴间隔分布。
A lawn aerator has a series of tine assemblies spaced along a driven shaft driven by a motor.
两个发动机驱动的电控液压泵（排量可变），四个大型和四个小型的液压控制马达（排量可变）。
The systems comprise two engine-driven, electrically controlled, variable displacement hydraulic pumps and four large and four small hydraulically controlled, variable displacement hydraulic motors.
由沼气发动机驱动的热泵(BHP)除能够保证一般热泵功能外，还能够充分回收利用沼气发动机的余热。
Biogas engine-driven heat pump (BHP) not only has the same functions of compression heat pump, but also can utilize the waste heat recovery from biogas engine.
已经有数百辆混合动力轿车被转换成了充电式混合动力车。这些车内，充电式电动力已经取代了汽油发动机驱动的发电机。
Hundreds of the Priuses have already been converted to plug-in hybrids, in which some of the electricity comes from plugging into the grid rather than using the gasoline engine to drive a generator.
检察员说，“内燃机驱动或发动机驱动的消防泵都不是防震的，这些泵如果失效，电站内整个灭火系统和消防卷盘都将无法使用。
Diesel-driven and motor-driven fire pumps are not seismic and the loss of these pumps would make all suppression systems and hose reels in the plant unavailable.
连接在蒸汽机上的旋转式发动机使轴承转动，机器得以驱动，从而使得利用蒸汽动力纺线和织布的工厂出现。
A rotary engine attached to the steam engine enabled shafts to be turned and machines to be driven, resulting in mills using steam power to spin and weave cotton.
通过高效的蒸汽泵驱动，发动机将矿井中的水排出，这使得矿井可以变得越来越深。
The engine eliminated water in the mines by driving efficient pumps, which made possible deeper and deeper mining.
在他的申请中，塞尔登描述了一种有汽油驱动的燃烧式发动机的机器，它就在司机的前面。
In his application, Selden described a machine with a gasoline-driven, combustion-type engine that sat in front of the driver.
这些发动机是由蒸汽驱动的。
工程师马丁·培根和杜克大学的志愿者，将一辆旧车进行了拆分，并用气化炉和过滤器对其进行重装，将咖啡豆废渣变成能量驱动发动机。
Engineer Martin Bacon, with Volunteers of Durham, stripped out the old car and refitted it with a gasifier and filters, which turns waste coffee granules into energy to drive the engine.
在许多情况下，在工业设备中使用由电池电力驱动的电动机比使用柴油发动机效率更高。
In many cases, using electric motors powered by batteries will be more efficient than running diesel engines in industrial equipment.
值得密切注意的还有，一种新型六人座的雷诺混合动力车和四轮驱动的雪铁龙，两个前轮用柴油发动机驱动，一个电动马达在后方作业。
Watch out too for a new six-seater Renault hybrid and a four-wheel drive Citroën with a diesel engine powering the front wheels and an electric motor operating the rear ones.
在“恶魔”无人机上，空气来自一个单独驱动的压缩机，但在正式生产的机型上，空气可以由发动机导出。
On Demon, the air is produced from a separately powered compressor, but in a production aircraft it could be drawn from the engine.
广泛的以电力为驱动的空中旅行很不现实：飞机发动机需要高密度的能量，而这些只有化学燃料才可提供。
There is no realistic prospect for widespread electric air travel: the jet engines on aircraft need the high-energy density that only chemical fuels can provide.
今天，中国和印度是发动机，虽然仍存在复杂困难的问题，但却驱动着增长的列车。
Today, China and India are engines, still facing complex and difficult problems, but driving motors of growth.
发动机是用一种新的石油产品还是用氢气来驱动？
Will the motor be powered by a new kind of petroleum product or by hydrogen?
新技术 - 包括节约劳动力的发明，工厂生产，化石燃料驱动的发动机 - 在西欧的其他国家传播着，之后到了美洲。
The new technologies—labour-saving inventions, factory production, engines powered by fossil fuels—spread to other parts of western Europe and later to America.
发动机驱动着机器人的尾巴和连接它上身那弯曲的像梁一样的固定装置。
The motor that drives the robot's tail and a curved, girder-like stabilizer bar attach to the robot's upper body.
这款小型跑车动感十足，采用混合动力驱动，装有一个电动发动机和一个氢发动机，车窗上的橡胶织物则为其披上一件透明外衣。
This small and dynamic sports car is ahybrid, equipped with an electric motor and a hydrogen engine. Rubber fabric onthe doors help them to appear transparent.
如果汽车需要更多的里程，燃气发动机就投入使用，产生额外的电能来驱动电机。
If the car needs more range, a gas engine kicks in to power a generator that creates additional electricity for the electric motor.
如果我们再也不会死去了，那么驱动文明的发动机将会立刻熄火并完全停止运转。
If we were all immortal, the motor of civilization would sputter and stop.
很多配有舷外发动机的船，就像舷内发动机的船一样，是由电池启动的，使用燃料驱动交流发电机再给电池充电并供船只使用。
Many sailboat outboards, like inboards, are battery-started and use alternators to return power to the batteries and supply the boat's needs.
此外，无人机的发动机比要驱动沉重的有人驾驶飞机的发动机体积小，因而发热更低。
Moreover, drone engines are smaller-and therefore cooler-than those powering heavier, manned aircraft.
此外，无人机的发动机比要驱动沉重的有人驾驶飞机的发动机体积小，因而发热更低。
Moreover, drone engines are smaller-and therefore cooler-than those powering heavier, manned aircraft.
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