问题描述：
请教这句话的详细语法结构
Cell phones have changed so much in the past few years that with every new product launch comes another big dilemma for the cellular manufactures.
that引导什么从句?做什么成分?
Cell phones have changed so much in the past few years that with every new product launch comes another big dilemma for the cellular manufactures.
that引导什么从句?做什么成分?
问题解答：
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