总是能见到关系词不在从句中做作任何成份的句子,这是什么句?如下：There is also the

总是能见到关系词不在从句中做作任何成份的句子,这是什么句?如下：There is also the objection that the city has always been the core from which cultural advancement has radiated.句子中that好像不在从句中做任何的成份,只是对 objection 做一个进一步的说明.总是能见到非常多的名子