ADJ
（对不好或严重的事情）丝毫没有察觉的，毫不知情的
If someone is in blissful ignorance of something unpleasant or serious, they are totally unaware of it.
例句
Many country parishes were still living in blissful ignorance of the post-war crime wave.
庆幸的是，许多乡村教区仍然没有感受到战后的犯罪浪潮。