The main gate system alone is expected  to take around 18 years to complete.

仅主门系统预计就需要大约 18 年才能完成。

As well as the gate system there will  be miles of manmade beaches and dunes, improvements to the existing seawall in  Galveston and restoration of damaged ecosystems.

除了闸门系统外，还将有数英里的人造海滩和沙丘、加尔维斯顿现有海堤的改进以及受损生态系统的恢复。