herald
verb [ T ] formal uk/ˈher.əld/ us/ˈher.əld/
预示…的开始;（尤指通过庆祝或赞扬）宣布（常指好事）
to be a sign that something important, and often good, is starting to happen, or to make something publicly known, especially by celebrating or praising it
The president's speech heralds a new era in foreign policy. 总统的演说预示着一个外交政策新时代的开始。
This drug has been heralded as a major breakthrough in the fight against breast cancer. 据称这种药是在对抗乳腺癌方面取得的一个重大突破。
herald
noun [ C ] uk/ˈher.əld/ us/ˈher.əld/
formal预兆，前兆
a sign that something will happen, change, etc.
If this first opera of the season is a herald (= sign) of what is to come, we can expect great things. 如果本季的这第一部歌剧是一个信号，那么我们可以期待接下来的剧目会非常精彩。
（旧时的）传令官
in the past, a person who carried important messages and made announcements