heralded

The arrival of the swallows heralded the beginning of spring.

用法提示：heralded在这里表示‘预示着’，是herald的过去式，用作谓语动词。

The new policy was heralded as a major step forward for education.

用法提示：heralded用作被动语态，意为‘被宣布为’，强调重要的正面意义。

The scientist's discovery heralded a new era in medicine.

用法提示：heralded表示‘预示’，后接宾语，描述重要事件的开端。