adv.严肃（重）地；沉重地；重大地

He spoke in a gravely serious tone, indicating the importance of the matter.
他用一种极其严肃的语气说话，表明这件事的重要性。
The old man's voice had become gravely hoarse due to years of smoking.
那位老人由于多年吸烟，嗓音变得沙哑低沉。
Despite his grave illness, he remained optimistic and determined.
尽管病重在身，他仍然保持乐观和坚定的决心。
The soldier saluted gravely as the flag was lowered to half-mast.
当国旗降半旗时，士兵肃穆地敬礼。
The artist signed her name gravely on the canvas, acknowledging its significance.
艺术家神情庄重地在画布上签下了自己的名字，承认了这幅作品的意义。
She looked at him gravely, imploring him not to make the same mistake again.
她严肃地看着他，恳求他不要再犯同样的错误。
The professor lectured gravely on the consequences of global warming.
教授神情严肃地讲解全球变暖的后果。
The bishop delivered a gravely worded sermon about the sins of greed.
主教发表了一篇关于贪婪之罪的措辞严厉的讲道。
The situation is so grave that immediate action must be taken.
形势如此严峻，必须立即采取行动。
The archaeologist examined the ancient artifact with great gravity, realizing its historical value.
考古学家以极高的严肃性研究这件古代文物，意识到其历史价值。