1. Scientists explore the mystery of natural immunity and whether it could be a key to an aids vaccine. ��ѧ�����̽�����������ź�����ʷ�����ܷ��ҵ����̲�����Ĺؼ���
2. EMC experience with testing and the familiarity with the standards for Surge, Burst, ESD and RF Immunity. �е�ż��ݣ�EMC�����Ծ��飬��Ϥ��ӿ������Ⱥ������ŵ����Ƶ���俹�ŵȱ���
3. Since a relatively narrow bandwidth is involved, it is also likely that ac excitation also offers greater immunity to RF interference than dc excitation. ��Ϊ������Ե���խ�Ĵ����������ǿ��ܵĽ�������Ϊ��Ƶ���沢���ṩ�Ƚ�ΰ��İ�ȫ��ֱ�����š�
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n.
1. the state of not being susceptible
2. (medicine) the condition in which an organism can resist disease
3. the quality of being unaffected by something
4. an act exempting someone