Thefiddlercrab(蟹)isalivingclock.Itindicates(=shows)the...
问题详情： Thefiddlercrab(蟹)isalivingclock.Itindicates(=shows)thetimeofdaybythecolourofitsskin,whichisdarkbydayandpalebynight.Thecrab’schangingcolourfollowsaregulartwenty—fourhourplanthatexactlymatc...