After collecting a sample of fresh spatter, a geologist is silhouetted against a fountain of molten lava spouting from Hawaii's Mauna Ulu.
夏威夷毛纳。乌庐(Mauna Ulu .)活火山喷发形成熔岩喷泉，采集样品的地质学家剪影。
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It was found that the solid circulation rate , fountain height and bed pressure drop were all significantly influenced by the bypassing characteristics of the spouting gas.