做生意，向来就是个深奥的学问。

Where we are going and what I am doing.

youdao

他沉思着，仿佛在思索某个深奥的哲学问题。

He pondered, as if over some deep philosophical point.

《牛津词典》

假如无太多影响，在你的表达中使用一些深奥的词语对于其他人的卖弄学问可是一种很好的防卫。

If nothing else, having a few recondite words at your disposal can be a great defense against the pedantry of others.

youdao