The economy was booming and businesses were flourishing, however, the trend collapsed.
经济繁荣，企业蒸蒸日上，然而，形势垮塌了。

The roar and crash of man-made structures mingled with a dull booming from the earth itself.

建筑物纷纷倒塌的哗啦哗啦声与地球内部发出的低沉的隆隆声交织成一片。

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