1. An optimist sees an opportunity in every calamity; a pessimist sees a calamity in every opportunity. �ֹ�����ÿ�������п���һ�����ᣬ��������ÿ�λ������һ�����ѡ�
2. The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails. ���������߱�Թ�з磻�ֹ�������ϣ������ı䣻��ʵ�����ߵ���������
3. Both optimists and pessimists contribute to our society. The optimist invents the airplane and the pessimist the parachute. �ֹ��ߺͱ����߶���ᶼ�й��ס��ֹ��߷����ɻ��������߷�������ɡ��