5月28日电，美国总统特朗普表示，如果加拿大与美国保持分离，加入 “金穹” 系统将耗资610亿加元。

Group 1 - The core point of the article is that U.S. President Trump stated that if Canada remains separate from the U.S., joining the "Iron Dome" system would cost 61 billion Canadian dollars [1] Group 2 - The financial implication of Canada joining the "Iron Dome" system is significant, with a stated cost of 61 billion CAD [1]