Key issues for the tunnel would be its enormous construction cost combined with possible low profitability, similar to the Eurotunnel's financial situation since it opened in 1994.
”（对该隧道来说）关键问题是其庞大的建设费用和可能的低赢利能力，就像欧洲隧道于1994年投入运营后的财务状况一样。