After three unrequited follow-up emails, the sales rep finally called the client directly.

寄了三封都沒有回音的追蹤郵件後，業務代表終於直接打電話給客戶。

Our team's generous offer to share resources with the partner firm remained unrequited.

我們團隊慷慨提議與合作公司共享資源，卻一直沒有得到回應。

The hotel guest felt his repeated complaints were an unrequited effort to get attention.

那位飯店房客覺得自己一再投訴，卻始終是得不到回應的徒勞。