The contractor deliberately underestimated the renovation costs to win the office project bid.

承包商為了拿下辦公室翻修案的標案，故意低估了翻修成本。

Some vendors underestimate shipping fees at first, then add charges after the order is placed.

有些廠商一開始會刻意低報運費，等下單後再追加費用。

Our finance team never underestimates expenses in the budget just to impress the board.

我們的財務團隊從不為了讓董事會滿意而故意低估預算中的支出。