They form a defensive wall. 它们排成防守墙
she must run the gauntlet of defensive mothers keen to protect their young. 它必须穿过一长排保护心极强的母龙
Forming a defensive ring around their calves, the adults present a barricade that few hunters could breach. 成牛围成圈以保护它们的小牛, 一般的猎食动物很难突破这层封锁