1. It seemed like a foolish, harebrained idea. ���ƺ���һ�����ģ����ʵ��뷨��
2. Jumping into the icy water was a harebrained idea. �����ˮ����뷨��������
3. No matter how strong the evidence supporting it, conservation was viewed as a harebrained fantasy of fuzzy-headed intellectuals. ����֧������֤���ж�ôǿ����������Լ��Դһֱ������ֻ��ͷ�Է����֪ʶ���Ӳű��е�ɵ�ϰ�Ļ��롣