The conversation eventually turned to what’s new in research and development.
to what's new......这里省略了what后面的定从引导词that吗?
the conversation eventually turned to what’s new in research and development.
=the conversation eventually that was turned to the thing that is new in research development.
备注(1): turned to ....为过去分词短语作后置定语修饰the conversation.相当于被动结构定语从句that was turned to...
备注(2): what为融合性关系代词(融合性连接代词what=the thing that)引导名词性关系分句(介词to的宾语从句)
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