The new intern gave an ingenuous answer when the manager asked about her mistakes.

經理問起她犯的錯時，新來的實習生坦率地回答了。

His ingenuous email admitted that he had forgotten to confirm the shipping date.

他在那封坦白的電子郵件中承認自己忘了確認出貨日期。

Customers appreciated the ingenuous way the agent explained why the refund was delayed.

客服人員坦誠說明退款延遲的原因，顧客對此很感激。