1. The alevin swim upstream to find sheltered gravel areas for protection.
幼鱼逆流而上,寻找有庇护的砾石区域保护自己。
2. The alevin will stay in the gravel for a few months before emerging as fry.
幼鱼将在鹅卵石中停留几个月,然后才会孵化出来。
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