When they guess wrong, they guess again.
要是猜错了，他们会再猜。
They guess again that the American continental output will remain constant for "many years."
而在“许多年内”，美洲大陆的黄金产量可以一直保持当前的水平。
They guess again that the American continental output will remain constant for "many years."
而在“许多年内”，美洲大陆的黄金产量可以一直保持当前的水平。
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