关于疾病如何传播，普遍存在无知。

There is widespread ___ignorance about how disease spreads.

我对她对世界历史的完全无知感到震惊。

I was shocked by her total ___ignorance of world history.

然而，对周围事物的历史和起源一无所知，就像是对那些帮助创造今天这个现代世界的人不尊重。

However, living in ___ignorance about the history and the origins of things that one is surrounded with is like showing disrespect to those who helped to create the modern world as it is known today.