英語聽力文摘 最快的車是什么？
最快的車是什么?
Don :Hybrid cars are known as hybrids because they use an electric motor to augment the performance of a small, efficient gasoline engine. But this isn’t the only reason hybrids are more efficient than gas-powered cars. Did you know that Hybrid cars are made of lightweight materials, so they require less energy to accelerate or drive up a hill?
Yaël: You know, Don, maybe you just need to trust that hybrid cars are interesting enough on their own. I mean, did you know that some hybrids rely on a process known as regenerative braking to recharge their batteries. You see, when you brake, you remove energy from your car, which normally just dissipates in the form of heat. In some hybrids, though, the electric motor is used to slow down the car, at which time it also acts as a generator so it can divert some of that energy back to the batteries.
And did you know? In hybrids, instead of idling, the gas engine turns itself off, and you get power from the electric motor and batteries. Also, hybrid cars’ aerodynamic design and special tires reduce both air drag and drag against pavement, which also increases efficiency.
D: Cool!
Don:混合動力汽車簡稱“hybrids”，因為這類汽車采用電動馬達(dá)增加小而高效的燃?xì)獍l(fā)動機(jī)動力。但這并混合動力汽車比燃?xì)馄嚫咝У脑蛑?。你知道?混合動力汽車選用輕型材料，所以加速或爬坡需要的動力相對更少。
Yaël: Don, 要知道，混合動力汽車本身就很有趣。我的意思是，你知道嗎?一些混合動力汽車依靠“再生式制動”來完成充電。一般的汽車剎車時，通常以散失熱量的形式損失汽車動力。但是，混合動力汽車的電動馬達(dá)讓汽車減速，同時將這部分能量轉(zhuǎn)換成電能，充當(dāng)發(fā)動機(jī)的功效。
另外，你知道嗎?混合動力汽車發(fā)動機(jī)沒氣了，汽車并不會空轉(zhuǎn)，而是由電馬達(dá)繼續(xù)供能。此外，混合動力汽車采用氣流設(shè)計和特殊輪胎，從而減少空氣阻力和路面摩擦阻力，這也是混合動力汽車跑得快的原因。
D: 太贊了!
augment:增加，增大
aerodynamic：空氣動力學(xué)的
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