1. The mathematicians proceeded blithely and confidently to employ the new algebra. 数学家满怀喜悦和信心百倍地着手运用新的代数。
2. They blithely carried on chatting, ignoring the customers who were waiting to be served. 他们继续开心地聊天，将等著购物的顾客们置于一边。
3. But even in some cases in which the failure should seem obvious, the perpetrator is blithely unaware of the problem. 但是，即使是在一些失败似乎非常明显的情况下，失败者也意识不到自己的失败。
