布鲁斯·罗伯逊正在研究深海水环境，探寻海平面和峡谷底之间的中空地带。
Bruce Robeson is exploring the deep mid-water environment the void that lies between the sun-lit surface and the canyon floor.
布鲁斯·罗伯逊正在研究深海水环境，探寻海平面和峡谷底之间的中空地带。
Bruce Robeson is exploring the deep mid-water environment the void that lies between the sun-lit surface and the canyon floor.
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