When she lost her temper, which was seldom, she wouldn't touch any food for a long time.
她不常发脾气,但是一旦她发脾气就长时间不吃任何东西。
Whenever he went to Beijing, and that was seldom, he would take a photo before the Tian An Men.
他不常去北京,但当他去北京时都要在天安门前拍张照片。
It is seldom that we hear such a strange news as this.
It is seldom that it rains at such a time in winter.
It was seldom that she missed the school bus.