机灵的

• pretty
• argute
• shrewdly
• clever
• wise
• tactical
• shrewd
• coony
• gumptious
• ingenious
• quick on the trigger
• cagey
• alert

例句

1. 解迷必须有机灵的头脑。
   One need an agile mind to solve puzzles.
2. 这个机灵的小伙子设法取得那个标致女孩的欢心。
   The cute lad did all he could to win the pretty girl's favour.