Upward - fining channels may occur in a wide range of environments, from submarine canyon to alluvial fan.

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.

辞典例句

And they couldn't be more perfectly placed because just off shore lies a vast submarine canyon.

这里的位置是最理想的,因为海岸边的水下就是大片的峡谷.

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