metropolis;large city;big city;megapolis ;

They wonder if their community is no longer insulated from big city problems.
他们在想是否大城市的问题离自己的社区也已经不再遥远了。
来源:《柯林斯高阶英汉双解学习词典》In the country's largest cities there has been rioting and looting.
该国的大城市有暴乱和抢劫发生。
来源:《柯林斯高阶英汉双解学习词典》The firm has offices in several large cities, but does most of its business by mail.
公司在几座大城市都设有办事处,不过大部分业务都通过邮政系统来实现。
来源:《柯林斯高阶英汉双解学习词典》
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