什么是 squadron?A naval unit consisting of two or more divisions of a fleet.An armored cavalry unit subordinate to a regiment and consisting of two or more troops.A cavalry or armored unit of a European army, corresponding to a company.A basic tactical air force unit, subordinate to a group and consisting of two or more flights.A multitude or horde: "Squadrons of flies like particles of dust danced up and down” ( T.E. Lawrence).