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."

youdao

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."

youdao