This is battlefield medicine right now so we're doing the best we can with what we have.

现在这是战场医学，所以我们正在尽我们所能。

But his petition for a waiver was granted, and for the past year he has trained in battlefield medicine.

但他的豁免申请得到了批准，而且在过去的一年里，他已经接受战地医学训练。