As sediment particles in suspension,snails(oncomelania hupensis)are transported in riversand canals,however,their transportaiton mechanism is a complex process of mechanics.
水流
钉螺同水流
沙一样，是一种复杂的力学过程。
As sediment particles in suspension,snails(oncomelania hupensis)are transported in riversand canals,however,their transportaiton mechanism is a complex process of mechanics.
水流钉螺同水流沙一样，是一种复杂的力学过程。
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