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(qū)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。