一般用于向要离开一个场合对主人说或退出一场对话时向对话者说.是非常委婉地地表示想要离开.
NANCY：Yes.Here you are.The bathroom is upstairs.It'the second
door on the left.
NANCY:是.给你.卫生间在楼上左手第二个门.
JON:Thanks Nancy.If you'll excuse me now.
JON:Nancy.如果你不介意的话,我现在要去一下.