1. It is easy to investigate various crime scenes, especially for the testes with physical defects such as deaf-mute, it is also valid. ����ʵ�ֶԸ������������ļ�⣬�����Ƕ�������ȱ�ݵı����Զ����������ˣ�ͬ�����Խ��в��ԡ�
2. If his dream was to live in the woods, with a fireplace and a typewriter and sheaves of notes hooked on the wall, almost like a deaf-mute in his dealings with the world, that was his affair. ����������ס�������У������б�¯�������д��ֻ���ǽ�Ϲ��ų����ıʼǣ�������������һ�������������������������������Ļ���
3. However, compared to the normal population, the deaf-mute students who lost all or nelly most of the hearing, they have been lacking one kind of important cognitive ability����natural language. Ȼ��������ѧ����Ϊɥʧ��ȫ���������������Ⱥ�壬������ѧ����ȣ�����ȱ����һ����Ҫ����֪���ܡ�����Ȼ���ԡ�
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n.
1. a deaf person who is unable to speak
2. lacking the sense of hearing and the ability to speak