Our damp clothes dried. We spread the picnic cloth on the floor of the mine shaft, away from the edge of darkness.
我们的湿衣服干了，就在矿井里在远离黑暗边缘的地面上摊开了野餐布。
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Rescuers got a stark lesson after Utah's Crandall Canyon mine collapse in 2007, when nine people died. Only one mobile robot made it down a borehole and onto the mine's floor.