Someone or something that is solemn is very serious rather than cheerful or humorous.
例句
His solemn little face broke into smiles...他严肃的小脸蛋上突然绽放出笑容。He looked solemn.他看上去很严肃。
ADJ-GRADED
(承诺、协定等)庄严的,郑重的
A solemn promise or agreement is one that you make in a very formal, sincere way.
例句
...a solemn pledge that he would never remarry.他永远不再结婚的郑重承诺
英汉词典释义
adv.
庄严地;严肃地
The two sides solemnly declared,“The region must be made immune from any foreign interference.”双方庄严宣告:“必须使这一地区免受外国干涉。”The whole city solemnly assembled on the square.全市人民在广场上隆重集会。He vowed quite solemnly that he would carry out his promise.他非常庄严地发誓要实现他的诺言。