Financial firms cluster in London because they derive external economies of scale.
在伦敦的金融机构受益于彼此产生的规模效应。
These high-technology industries are subject to high risks, require large-scale production to achieve economies of scale, and give rise to extensive external economies when successful.
这些高科技工业有很高的风险，要求大规模生产已形成规模经济，当其成功时便可带来外部经济。
These high-technology industries are subject to high risks, require large-scale production to achieve economies of scale, and give rise to extensive external economies when successful.
这些高科技工业有很高的风险，要求大规模生产已形成规模经济，当其成功时便可带来外部经济。
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