1、The oppressive heat made it difficult to breathe.
酷热难耐，令人呼吸困难。

2、Under the oppressive regime, people lived in fear and silence.
在这个压迫的政权下，人们生活在恐惧和沉默中。

3、The oppressive atmosphere in the room made everyone feel uneasy.
房间里的沉闷气氛让每个人都感到不安。