Canadian Shield
An area of very old bedrock surrounding Hudson Bay, and covering about half the land area of Canada.
Third-person singular simple present indicative form of embound
present participle of self-destruct
Having a green face or appearance.
地質学者たちは、ハドソン湾を取り囲む古い基盤岩であるカナダ楯状地を研究して、その地形を形成する仕組みを理解しようとしました。
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