他在演讲中犯了一个愚蠢的错误，把重要数据说错了。

He made a huge ___blunder during the speech by misquoting the key data.

他在黑暗中笨拙地摸索着，不小心撞到了桌子。

He ___blundered in the dark and accidentally bumped into the table.

他因为粗心大意，把客户的订单搞错了。

He ___blundered by mixing up the customer's order due to carelessness.