1. But this time, clever friend. ������Σ����������ѡ�
2. What a clever boy you are! ����һ������������к���
3. I am a clever dolphin. ����һֻ�����ĺ��ࡣ
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adj.
1. skillful (or showing skill) in adapting means to ends
2. showing self-interest and shrewdness in dealing with others
3. mentally quick and resourceful
4. showing inventiveness and skill