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文字稿:

One day, this could be the world's fastest train.

Using magnets to float above the track, the maglev can reach speeds of over 500 kilometres per hour (500km/h).

Ministers in Japan have called it "world-class" technology.

The venture cost billions of US dollars, though some hope the technology could be sold to overseas markets.

But don't turn up at the station any time soon. The train isn't expected to open its doors to passengers until 2027.

Vocabulary 詞匯:

magnets 磁鐵

world-class 世界一流的

venture 風(fēng)險項目

overseas 海外的，其他國家

turn up 前去，抵達(dá)