湖下的熔岩管道直径只有6英尺，不足以迅速把水泄走。
Because the lava tube measures just six-feet in diameter it is unableto drain the water fast enough .
岩浆流还会继续往地下腐蚀，加深熔岩管道。
As the lava flow continues to flow , it erodes the ground creating an even deeper channel .
熔岩管道