Test results show that spur dikes aligned along a single bank in the deep water zone have more effects on the adjustment of the bed topography of the wide-shallow river than in the shallow water zone;

试验结果表明，在深水区的单侧丁坝群对宽浅河床地形的调整作用大于浅水区；

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The US space agency has been running the programme since 2001, using the 20m-deep Aquarius habitat as its test-bed facility.

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