即使是内容严肃的报纸也认为这是一次胜利。Even the quality papers agreed that it was a triumph.烹饪课既是一件严肃的事又是一种享受。The cookery course was serious and hedonistic at the same time.我认为对如此严肃的问题来说，该评论不合时宜。I feel the remark was inappropriate for such...

“严肃的”的英语可以翻译为：serious，solemn，earnest，grave，elevated ...