Definition: effective and showing intelligence Level: B1
这个谜语很巧妙，你能猜出答案吗？
This riddle is very ___clever. Can you guess the answer?
那是个解决问题的巧妙方法。
That's a ___clever way to solve the problem.
他发明了一个巧妙的节水装置。
He invented a ___clever device for recycling water.
