Successful test of u.s. navy electromagnetic railgun .
美国海军宣布电磁轨道炮试射成功。
Picture a huge railgun rising from the ground at kennedy space center .
想象一个巨型的轨道炮出现在肯尼迪太空中心上的样子吧。
' Today 's railgun test demonstrates the tactical relevance of this technology , which could one day complement traditional surface ship combat systems , ' adm carr said .
The railgun is a longe-range , high-energy device that uses electricity instead of explosives or propellants to launch projectiles , which could reduce the need to carry explosives or chemical propellants out to sea .
This image released by the us navy , shows the office of naval research 's electromagnetic railgun located at the naval surface warfare center dahlgren division . -- Photo : afp