Escutcheon: a shield or shield-shaped emblem bearing a coat of arms.
盾状徽章:表层带有武器的盾或盾状徽章。
Small freshwater crustaceans with a shield-shaped carapace
长有盾牌状甲壳的小型淡水甲壳动物
Marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces. small freshwater crustaceans with a shield-shaped carapace.
海生甲壳动物,有羽毛状捕食的附肢;幼体独立游水;成体形成硬壳附着生活于水下。小型淡水甲壳动物,长有盾牌状甲壳。
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