垃圾句子，正常人都看不懂。

【 在 McJohn 的大作中提到: 】
: It is predominantly the process by which towns and cities are formed and become larger as more people begin living and working in central areas.
: 这个by是对process的解释，表示通过以下的原因导致……
: which代表的是process，它是这个长句后半部分(by之后)的主语，从towns到句尾都是在阐述which所代表的process.
: ...................
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FROM 68.97.41.*