1. The mamba is mainly threatened by habitat destruction. ��������Ҫ�ر������ƻ���в��
2. Like Habitat, some organizations rely heavily on volunteers or in-kind donations for core activities. ��Щ��֯Ҳ����Ϣ��һ�������Ļ��Ҫ�����幤��ʵ�������
3. Most of us enjoy fishing, swimming and having fun on the beach, and scientists and students have endless opportunities to studyavariety of life in the habitat. �����кܶ���ϲ�����㣬��Ӿ���ں�������ˣ����ѧ�Һ�ѧ�����������Ļ���ȥ�о�����ĸ��ָ��������
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n.
1. the type of environment in which an organism or group normally lives or occurs