1. JPL scientists admit the idea is "aggressive, even audacious", but are convinced that it is both practical and feasible. ��ʵ���ҿ�ѧ�ҳ��ϣ�����뷨�ǡ��д����ģ������Ǵġ���������ʵ���ֿ��У�����˵������
2. But that audacious move set off what is now regarded as one of history's largest, fastest and most widespread migrations. ���ǣ���һ���ж��������ֽ���Ϊ����ʷ����һ���������ٺͷֲ������˿�Ǩ�㡣
3. Only here, this tower was the most audacious, the most open, the most ornamented spire of cabinet-maker's work that ever let the skypeep through its cone of lace. �Դ�һ�䣬����¥�ļⶥ������գ���������¥�ⶥ������¡����ϸ�̡����������ģ����������Ƶ������̿�һ�����ࡣ
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adj.
1. invulnerable to fear or intimidation
2. unrestrained by convention or propriety
3. disposed to venture or take risks