2. For us, they toiled in sweatshops and settled the West; endured the lash of the whip and plowed the hard earth. Ϊ�����ǣ�������Ѫ����������������������ӣ����ܱ��ӵij���ż�Ӳ�����ء�
3. There are many risks in metro engineering during its life cycle, which are the serious barriers to realize the settled goals. ������Ŀ��ȫ���������ڴ��ڴ����IJ�ȷ���Է������أ��谭����Ŀ����Ŀ���ʵ�֡�
ӢӢ����
adj.
1. established or decided beyond dispute or doubt
2. established in a desired position or place; not moving about
3. inhabited by colonists
4. clearly defined
5. not changeable