答：八国集团是发达国家合作机制，中国不是八国集团成员。
A: G8 is a cooperation mechanism for developed countries, to which China does not belong.
八国集团（G8）是由世界上八个最富有的国家组成的。
The Group of Eight (G8) consists of the eight richest countries in the world.
八国集团（G8）是由世界上八个最富有的国家组成的。
The Group of Eight (G8) consists of the eight richest countries in the world.
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