China didn't have a high-speed rail five years ago. But now the tickets of high-speed trains are usually sold out very quickly, even though the departure interval is quite short. And people can conveniently travel around the nation at a speed that doubles the speed of the fastest American train. The operation of high-speed rail system is very successful; it carries twice as many passengers as the nation's civil aviation system. China has one of the most advanced rapid transit systems with low emissions in the world, and it only takes five years to achieve this.
中國(guó)五年前根本沒有高速鐵路。但是現(xiàn)在高鐵列車（high-speed trains）的票經(jīng)常很快就售罄，盡管發(fā)車間隔比較短。人們能夠很方便地以兩倍于美國(guó)火車最高速的速度在全國(guó)周游。高速鐵路系統(tǒng)的運(yùn)營(yíng)非常成功，它運(yùn)載的乘客是全國(guó)民航（civil aviation）系統(tǒng)運(yùn)載的乘客的兩倍。中國(guó)有世界上最先進(jìn)的、低排放的快速運(yùn)輸系統(tǒng)之一，而做到這一點(diǎn)僅僅用了五年。
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