帮我分析一下这个句子的结构,后面那个半句没谓语啊It'a one thing if a scientific experiment goes wrong in a lab,they say,but something else entirely if it winds up on your dinner plate
问题描述：
帮我分析一下这个句子的结构,后面那个半句没谓语啊
It'a one thing if a scientific experiment goes wrong in a lab,they say,but something else entirely if it winds up on your dinner plate
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