She could not ignore his indecorous behaviour though she loved him very much .

尽管她非常爱他却无法忽视他那有失体统的行为。

That is without doubt the most indecorous thing I have done in years .

毫无疑问这十几年来我做过的最失礼的事。

He felt that there was something indecorous in her proposal .

他觉得她的打算有点不恰当。