基本解释[地球科学]波罗的地盾词组短语短语baltic c shield 波罗的地盾baltic shield更多词组英英字典柯林斯英英字典 the wide area of ancient rock in Scandinavia (Also called Scandinavian Shield.)baltic shield剑桥字典baltic shield柯林斯字典专业释义地球科学波罗的地盾