1. The Australian Terrier is spirited, alert, courageous, and self-confident, with the natural aggressiveness of a ratter and hedge hunter; ������һ�־�����ʢ�����衢�������ŵĹ��������Ի����IJ����ߺ�ľ�����֣�
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n.
1. a disloyal person who betrays or deserts his cause or religion or political party or friend etc.
2. any of several breeds of terrier developed to catch rats