Heralding
v. 预示( herald的现在分词 ); 宣布（好或重要）
🗣️ 情景例句
Our teacher drills us in English.
我们老师让我们反复操练英语。
We have a small gift for you to take with you when you leave the factory.
你离开工厂时，我们有件小礼物要送给你。
Once the existence of this wave-length had been discovered,
一旦这种波长的实际存在被发现，