Greeksoldierssentmessagesbyturningtheirshields(盾)toward...
問題詳情：Greeksoldierssentmessagesbyturningtheirshields(盾)towardthesun.Theflashesreflectedbylightcouldbeseenseveralmilesaway.Theenemydidnotknowwhattheflashesmeant,butotherGreeksoldierscouldunderstandt...