Question

请帮忙分析一下下面句子结构

New York is too big to be dominated by any group, by Wasps or Jews or blacks, or by Catholics of many origins — Irish, Italian, Hispanic. All have their little sovereignties, all are sizable enough to be reckoned with and tough in asserting their claims, but none is powerful enough to subdue the others. Characteristically, the city swallows up the United Nations and refuses to take it seriously, regarding it as an unworkable mixture of the idealistic, the impractical, and the hypocritical. But New Yorkers themselves are in training in how to live together in a diversity of races- the necessary initiation into the future.

Answer 1

整个段落包含4个句子。
New York is too big to be dominated by any group, by Wasps or Jews or blacks, or by Catholics of many origins — Irish, Italian, Hispanic. --这是一个简单句，主（New York）系（is）表 （too big to be dominated by...) 结构。
All have their little sovereignties, all are sizable enough to be reckoned with and tough in asserting their claims, but none is powerful enough to subdue the others. 这是并列句。All have..., all are..., but none...这是并列的部分，其中的并列句部分都是简单句（主谓、主系表、主系表）。
Characteristically, the city swallows up the United Nations and refuses to take it seriously, regarding it as an unworkable mixture of the idealistic, the impractical, and the hypocritical. 这个句子看起来比较长，但这是一个简单句。主语是the city， 并列谓语动词是 swallows up 和 refuses，各自带自己的宾语 （the United Nations , to take it seriously), 从regarding开始是现在分词短语作定语。
But New Yorkers themselves are in training in how to live together in a diversity of races- the necessary initiation into the future. 最后一句是个简单句。主语是New Yorkers， 谓语部分是are in training， 状语部分是in how to live together in a diversity of races- the necessary initiation into the future.

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请问一下第四句in后面不是应该接which才能引导从句吗