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

到了18世纪中期，烟花已经可以供个人消费了。

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It was built by Czar Ivan the Terrible in the mid-16th century.

它是由“恐怖的沙皇伊凡”于16世纪中叶所建。

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It was built by Czar Ivan the Terrible in the mid-16th century.

它是由“恐怖的沙皇伊凡”于16世纪中叶所建。

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