问题描述：
请英语高手帮我看看这个句子
But tumors also have their own genetic signature ——four to seven genetic changes that are critical to turning ,say ,a normal breast or colon or liver cell into a cancerous one
这个句子中four to seven genetic changes that are critical to turning 是不是第一句的插入语?a normal breast or colon or liver cell into a cancerous one是不是第二句的插入语呢?
But tumors also have their own genetic signature ——four to seven genetic changes that are critical to turning ,say ,a normal breast or colon or liver cell into a cancerous one
这个句子中four to seven genetic changes that are critical to turning 是不是第一句的插入语?a normal breast or colon or liver cell into a cancerous one是不是第二句的插入语呢?
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