Canadian shield
柯林斯词典
1. N (in Canada) the wide area of Precambrian rock extending west from the Labrador coast to the basin of the Mackenzie and north from the Great Lakes to Hudson Bay and the Arctic: rich in minerals (在加拿大)加拿大地盾; 从拉布拉多沿海地区向西延伸至麦肯齐河，从五大湖向北延伸至哈得逊湾和北极的由前寒武纪岩石构成的广阔地区，此区域富含矿物质 (Also called Laurentian Shield, Laurentian Plateau)
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