| 单词 | 干流 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔alluvial fan〕A fan-shaped accumulation of alluvium deposited at the mouth of a ravine or at the juncture of a tributary stream with the main stream.冲积扇:指储藏在峡谷山口或在支流与干流交汇处的扇形沉积物美国传统 |
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