CNN News：無人駕駛車輛利弊衡量

Which of these companies is not considered one of America`s "Big Three" automakers?

這些公司中哪一家不是美國“三大”汽車制造商之一?

Ford, General Motors, Toyota, or Fiat Chrysler?

福特、通用、豐田還是菲亞特克萊斯勒?

Though it`s one of the largest carmakers in the world, Toyota isn`t considered one of America`s "Big Three" because it`s based in Japan.

雖然豐田是世界上最大的汽車制造商之一，但它并不是美國的“三大汽車制造商”之一，因為它的總部設在日本。

AZUZ: One thing they all have in common is their investment in driverless cars, autonomous vehicles. They`re being tested around the world. And though there`s a lot of talk and excitement over cars and trucks that completely drive themselves, most experts say that won`t be a reality for decades.

“三大”汽車制造商都有一個共同點，那就是他們對無人駕駛汽車、自動駕駛汽車進行投資研發(fā)。同時正在世界各地接受測試。盡管對于驅動無人駕駛的汽車和卡車有很多的言論和令人興奮的成果，但大多數(shù)專家說，這在未來幾十年里都不會成為現(xiàn)實。

There are debates over whether they`ll make transportation cheaper or worsen urban sprawl, whether they`ll reduce air pollution or increase traffic. There are questions about their safety. And one big concern is how they`ll impact the economy.

這些新研發(fā)的汽車是否會降低交通運輸成本或會惡化城市蔓延，是否會減少空氣污染還是增加交通流量，都存在爭論。對于安全也存在爭議。另一個重要的問題是這些汽車將如何影響經(jīng)濟。