Nowadays our short-term memories are just being underused.

如今，我们的短期记忆没有得到充分利。

Doctors say that drug is underused.

，这种药物没有得到充分利。

The third point is that governments are underusing fiscal policies in healthcare.

第三点是，政府在疗保健方面没有充分利财政政策。

He argues that short-term memory pathways will start to deteriorate from underuse if we overuse technology.

他认为，如果过度使科技，我们就无法充分使短期记忆通路，最终造成其退化。