Many people soothe their consciences by purchasing only free-range fowl and eggs, blissfully ignorant that "free range" has very little practical significance.
许多人只买自由放养的家禽和鸡蛋，以此来安抚自己的良心，幸福地忽视了“自由放养”几乎没有实际意义。
2
We're blissfully happy.
我们非常幸福快乐。
《柯林斯英汉双解大词典》
3
At first, he was blissfully unaware of the conspiracy against him.