serious
US /ˈsɪr.i.əs/
UK /ˈsɪr.i.əs/

1.
嚴肅的, 認真的
demanding or needing careful consideration or application
:
•
This is a serious matter that requires our full attention.
這是一個需要我們全力關注的嚴肅問題。
•
He made a serious effort to improve his grades.
他為提高成績付出了認真的努力。
2.