Quadriennum utile
[法] 四年有效期
🧩 词语组成解析
a. 有用的；有益的
🗣️ 情景例句
Could I trouble you with something for a moment please?
请问可以麻烦你一下吗？
Could you tell me where is the exit?
你能不是告诉我出口在哪里？
You've done a wonderful job. Well done! Well done!
你真做得太棒了！