Agroupofswimmershasdescribedhowagroupofdolphinsprotecte...
问题详情：Agroupofswimmershasdescribedhowagroupofdolphinsprotectedthemfromagroupofwhitesharks（食人鲨）offthecoastofNewZealand.Thelifeguardswereonatrainingswimwhentheycameacrossagroupofgreatwhitesharksbefor...