serious

意味

• adj. 深刻な, 真剣な, 重大な

英語の定義

• adj. concerned with work or important matters rather than play or trivialities
• adj. of great consequence
• adj. requiring effort or concentration; complex and not easy to answer or solve

例文

1. adj. 深刻な, 真剣な, 重大な

   Climate change has become a serious problem for many countries around the world.

   気候変動は世界中の多くの国々にとって深刻な問題となっています。