On Sunday, underground workers draining water from the flooded section saw swaying lamplight at the other end of the flooded v-shaped shaft, raising hope again.
周日，负责在地下从透水段抽水的工人见到V型巷道的另一端有微弱的灯光透出，这再次燃起人们的希望。
It's unknown whether the lava is residual material that's draining through the underground tube system or if the flow is still being supplied by lava from the crater, scientists say.
科学工作者们说，不知道熔岩是否是地下管道系统排出的残留物质，或者是否火山口的熔岩仍然在提供流量。
The new-type of hose pulsating pump is used for underground face draining and sump cleaning.
采用新型软管壁外脉动泵进行井下工作面排水及水仓清理。
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