1. Many people claimed to be a skilled prognosticator, but their predictions turned out to be inaccurate.
许多人自称是熟练的预言者，但他们的预测都被证明不准确。

2. The ancient civilization relied on the wisdom of prognosticators to guide their decisions.
古代文明依靠预言者的智慧来指导他们的决策。