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向上变细的水道可以出现在好多种环境中，从海底峡谷到冲积扇。
Upward-fining channels may occur in a wide range of environments from submarine canyon to alluvial fan.
youdao
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向上变细的水道可以出现在好多种环境中，从海底峡谷到冲积扇。
Upward-fining channels may occur in a wide range of environments from submarine canyon to alluvial fan.
youdao