![retinas造句怎么写]( "retinas造句怎么写")
- "Wehavespecialreceptorsonourretinas,calledphotoreceptiveganglioncells."MorethanamillionpeopleinBritainsufferfromvisionproblemscausedbyadamagedormalfunctioningretinas.Ourretinashavespecializedcellscalledrods,whichareusedfornightvision,andcones,which...
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