adj.庸俗的,下流的;
例句:
Theron always scolds his servant with the four-letter words.
西伦总是用下流话骂他的仆人.
He always scolds his servants with the four-letter words.
他总是用下流话骂他的仆人.
Tommy, I won't allow you to use four-letter words.
汤米, 我不允许你用低俗的字眼.