Sent_en: 2zh Israel already has three older nuclear weapons-capable Dolphin submarines but the new Dolphins have propulsion systems that allow them to remain submerged for longer periods of time, according to the Jerusalem Post, making it harder for them to be tracked by satellite.
Sent_yy: 据“耶路撒冷邮报”报道，以色列已经拥有三艘具有核武器能力的海豚潜艇，但新型海豚拥有推进系统，可以让它们长时间潜在水下，这使得它们更难以被卫星追踪。