1. JPL scientists admit the idea is "aggressive, even audacious", but are convinced that it is both practical and feasible. 该实验室科学家承认，这个想法是“有闯劲的，甚至是大胆的”，但它既实际又可行，很有说服力。
2. But that audacious move set off what is now regarded as one of history's largest, fastest and most widespread migrations. 可是，那一大胆的行动导致了现今认为是有史以来一次最大、最快速和分布最广的人口迁徙。
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. 略带一句，这钟楼的尖顶如箭穿空，是所有钟楼尖顶最大胆求新、最精雕细刻、最玲珑剔透的，透过其网扣似的塔锥，碧空一览无余。
英英解释
adj.
1. invulnerable to fear or intimidation
2. unrestrained by convention or propriety
3. disposed to venture or take risks
