In 1951, the British Challenger expedition sounded6 33,640 feet at one place in the trench.
1951年，英国挑战者探险队测到海沟的一个地方有33640英尺深。
These surveys caused the Admiralty and the Royal Society to mount the famous Challenger expedition.
这些调查活动促使海军部和英国皇家学会组织了“挑战者号”科学考察。
Shortly after this the famous H. M. S. Challenger expedition established the study of the sea-floor.
此后不久，英国著名的“挑战者”号舰艇对海底的那次考察。
Shortly after this the famous H. M. s. Challenger expedition established the study of the sea-floor as a subject worthy of the most qualified physicists and geologists.
此后不久，英国著名的“挑战者”号舰艇对海底的那次考察，把对海床的研究确立为一个值得一流物理学家和地质学家从事的研究课题。
Shortly after this the famous H. M. s. Challenger expedition established the study of the sea-floor as a subject worthy of the most qualified physicists and geologists.
此后不久，英国著名的“挑战者”号舰艇对海底的那次考察，把对海床的研究确立为一个值得一流物理学家和地质学家从事的研究课题。
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