1. This is the crux of the present dilemma. ����ǵ�ǰ������֢�����ڡ�
2. Understanding of pioneer art has become a puzzle as well as an ideological dilemma today. ���ȷ������������ڽ����ѳ�Ϊ�����⣬��Ϊ��һ��˼���������
3. It begins with a story about an extraordinary scientific discovery and the new dilemma that it poses. ������Ҫ��һ�����£�����һ���Ƿ��Ŀ�ѧ���֣��Լ��ɴ˴������µ�������
ӢӢ����
n.
1. state of uncertainty or perplexity especially as requiring a choice between equally unfavorable opti