Cov khoom tseem ceeb ntse tswj kev tsheb ciav hlau thiab txhim kho kev ua haujlwm thiab kev nyab xeeb Rail Transit yog ib qho tseem ceeb ntawm cov nroog niaj hnub no, muab cov pej xeem nrog txoj kev yooj yim, xis nyob, thiab ib puag ncig kev mus ncig.Txawm li cas los xij, kev khiav tsheb ciav hlau thiab kev tswj xyuas tseem ...
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