到了18世纪中期，烟花已经可以供个人消费了。

By the mid-18th century, fireworks were being sold for private consumption.

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价格控制虽然在短期内有效，但会在中期刺激消费和加剧供应短缺，从而使通胀更严重。

And price controls, while effective in the short term, encourage consumption and supply shortages in the medium-term, stoking inflation.

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但到了19世纪中期，英国的农业生产停滞不前，英国消费的粮食、肉类和农业原料越来越依靠从外国进口。

But in the mid-19th century, Britain's stagnant agricultural production, food consumption, the UK, increasingly dependent on meat and agricultural raw materials imported from abroad.

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