high-level intellectual

The evidence is quite clear: a high level of intellectual ability puts a person at a measurable advantage — and the higher the better.

证据很明显：高智力会带给人可度量的益处——智力越高益处越大。

A person with a high intellectual level may absorb something and maintain it for a longer period in memory.

一个智力水平高的人可以吸收某些东西并在记忆中保持较长时间。

Such conversation could be held only between people of a comparable or high intellectual level, and was therefore regarded as one of the most refined intellectual activities.

清谈被认为是一种高水平的智力活动，只能在智力较高，或旗鼓相当的人之间进行。