The sales forecast is uncertain because consumer demand remains an imponderable factor this quarter.

由於消費者需求仍是難以估量的因素，本季的銷售預測並不確定。

Fuel prices are imponderable, so our shipping costs for next year may change significantly.

燃料價格難以估量，因此我們明年的運輸成本可能會大幅變動。

Hiring a new director always involves imponderable risks, no matter how strong the résumé looks.

無論履歷看起來多亮眼，聘用新主管總會有難以估量的風險。