bug ָС���棬��ָ��Ѫ�ij��棬Ҳ��ָϸ���� insect ����㷺����ָ���ϡ��Ʒ䡢���ȵȡ� pest ָ�к���������к���С��� worm ����ָ���ϡ�ë���С���ǵij档
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1. Pest control is one of the major areas of concern in intensive agriculture. ���溦�����Ǽ�Լ��ũҵ�����ĵ���Ҫ����֮һ��
2. The first genetically modified animal to leave the lab will probably not be one designed to control a pest. ��һֻ�뿪ʵ���ҽ���Ұ���ת������Ҳ��������ƺ�ȥ���ƺ���ġ�
3. The creatures, which normally prey on pest insects, had been altered in a first step toward making them more effective against pests. ��Щ������ʳ����Ķ�������Ǹı����ʹ�䳯����Ч�IJ�ʳ�����������淢չ�ˡ�
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n.
1. a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmit
2. any epidemic disease with a high death rate
3. a persistently annoying person
4. any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.