1. “in bad(poor) taste”意思是“格调不高，不得体，庸俗”。

eg. That joke was in bad taste.
那个笑话很粗俗。

2. “in good(excellent) taste”意思是“风雅的，大方的，得体的”。

eg. Everything in his house is in good taste.
他家的一切陈设都很雅致。