1. 轻率的;欠考虑的;漫不经心的
You use blithe to indicate that something is done casually, without serious or careful thought.
e.g. It does so with blithe disregard for best scientific practice.
没有考虑最科学的做法就轻率地这么做了。
blithelyYour editorial blithely ignores the hard facts...
你的社论全然无视铁一般的事实。
He appears blithely unaware of the disastrous effects of the new system.
他看起来丝毫没有意识到新系统的灾难性后果。
2. 无忧无虑的;快乐无忧的
Someone who is blithe is cheerful and has no serious problems.
e.g. She said 'hi' with the blithe assurance of someone who knew how much she'd been missed.
她高兴地说了声“嗨”,好像确信大家非常想念她似的。