问一个语法问题
during the 1980's, the income gap between the richest and the poorest Americans widented significantly, and it continued to expand in the 1990's.
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这是OG上一道语法题的答案 但是个人认为这里面不是有个Comma splice嘛 significant后面不是该用分号嘛 麻烦达人解答一下为什么用逗号
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