power house
柯林斯词典
1. N-COUNT A powerhouse is a person, country, or organization that has a lot of power or influence. 權威人士; 強國; 權勢集團
Nigeria is the most populous African country and an economic powerhouse for the continent. 尼日利亞是非洲人口最稠密的國家，也是非洲大陸的經濟強國。
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