So, two Italian businessmen built a piston engine hydroplane named Laura 3.

于是，两位意大利商人制造了一架活塞式发动机水上飞机，命名为劳拉三号。

Without oxygen, the internal combustion engines found in 215 million vehicles in the US alone would be unable to turn heat into the work required to push the piston inside.

没有氧气，单单是美国的2.15亿辆汽车的内燃机就没有办法将热能转化为推动内部活塞运动所需的功。

All about him were the smell of steam and soot and fire, the noise, of box-cars, engines, boilers, the mysterious workings of pistons, valves, levers, gears.

他周围有蒸汽、煤烟火的气味，车厢、引擎的噪音，活塞、阀门、杠杆齿轮神秘的工作原理。

It's cool to see how they all banded together firing on all pistons to make their music play out.

看他们配合起来打开所有活塞，演奏音乐，真的是一件很酷的事情。

They use hydraulic pressure to work their legs like pistons, catapulting up to 30 times their own body length.

它们利用水压的原理，像活塞般地移动它们的腿，可以弹跳远达身30倍的距离。

Like these air pistons he uses to launch food.

比如他用来发射食物的这些气压活塞。

Like these air pistons he uses to launch food or these catapults.

就像这个他用来发射食物的气阀活塞，或是这些弹射器。

There's four stroke motors, four stroke piston engines being the most common.

有四冲程电机，四冲程活塞发动机是最常见的。

Then, with another whistle, he began to move forward;the train increased its speed, and soon its rapidity became frightful;a prolonged screech issued from the locomotive; the piston worked up and down twenty strokes to the second.

紧接着响了第二声汽笛，火车又开始前进了。它不断加快速度，一会儿，速度已经大到了分可怕的程度，车上只能听见机车发出的一阵隆隆声，活塞每秒钟进返二次。

A voice yelled behind her: " Miss Scarlett! Stop" ! Without slacking, she looked trembling over her shoulder and saw Big Sam racing down the road behind her, his long legs working like hard-driven pistons.

" 思嘉小姐，停下！" 她没敢让马放慢步子，先战战兢兢地回头一看，原来是萨姆跟在后面奔跑，两条腿快得像动力很大的活塞。

Well missy, the white smoke that you saw is steam from the radiator. You overheated your engine so now the pistons are busted and so is your transmission.

好吧，小姐，你所看到的白烟是散热器发出来的蒸汽。然后你（强迫引擎长时间满负荷工作）导致引擎过热，所以现在发动机的活塞坏了，变速器也坏了。

On the flip side, diesel engines are bulky, and typically consist of longer piston strokes, so they can't reach high RPMs without incurring a lot of mechanical strain.

另一方面，柴油发动机积庞大，通常由更长的活塞冲程组成，因此它们无法在不产生很大机械应变的情况下达到高转速。

But we're still against driving while intoxicated-so if you're gonna be toking, keep those pistons from stroking.

但是我们仍然反对吸食大麻后驾驶——如果你要吸食大麻，那就别让汽车活塞活动。

Steam rushed whistling into the gaping valves. Long horizontal pistons groaned and pushed the tie rods of the drive shaft.

蒸汽涌入半开的机关中；发出呼呼的啸声。一排排横列的活塞发出格格的声响，推动机轴的杠杆。

As the noise of the pistons fell away, the wind and rain sounded louder than ever against the windows.

车轮的声音小了，窗外的风雨声更大了。

What powers these pistons' movements is what gives these engines their namesake: combustion.

为活塞运动提供动力的正是这些发动机的名字：燃烧。

It's a project made up of scrap metal air pressure pistons and the imagination of an artist named.

艺术家Koliakugla凭借自己的想象力，利用废旧金属气压活塞组成这个乐队。

As the piston lowers, air and fuel are sprayed into the cylinder's chamber.

活塞下降时，空气燃料会被喷入汽缸腔内。

The pistons in the engine. Of the car. Just don't drive.

活塞在汽车引擎中，也就是说不要开车了。

The roar of mighty piston engines overhead tranfixed midday strollers and crowds along the National Mall.

强力活塞式发动机的轰鸣声让国家广场中午散步者人群感到震耳欲聋。