青藏铁路居世界多项第一，550公里冻土铺轨，世界最长的翻译：Ranking first in the world more of the Qinghai-Tibet Railway, 550 km track laying of frozen soil, the world's longest 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

The first number of the Qinghai-Tibet railway in the world, laying 550 km permafrost, the world's longest

Ranking first in the world more of the Qinghai-Tibet Railway, 550 km track laying of frozen soil, the world's longest

The Qinghai and Xizang railroad occupies world many items first, 550 kilometers frozen earth lays rails, the world is longest

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Ranking first in the world more of the Qinghai-Tibet Railway, 550 km track laying of frozen soil, the world's longest