She resigned because of ill health.
她因健康状况不佳而辞职。
I was angry because I played so badly.
我生气因为我弹得这么糟。
The road is closed because of the snow.
这条路因下雪而封闭。
Many diets fail because they are boring.
许多规定饮食因单调乏味都不奏效。
He walked slowly because of his bad leg.
他因为腿不方便而行走缓慢。