“严肃”造句

要求忠诚意味着你想发展一段严肃认真的恋爱关系。
Wanting fidelity implies you're thinking about a major relationship.

这本书的笔调有些时候太不严肃了。
The tone of the book is sometimes too flip.

“那件衣服很好看,”迈克尔说。“谢谢,”她严肃地回答。
"That's a nice dress," said Michael. "Thanks," she replied solemnly.