a matter of fact

例句：

1. 1.It's a matter of fact that we need to move out of the city for work.
   事实是我们需要搬到城外工作。
2. 2. The truth is that she was not at home when the fire broke out.
   事实上，火灾发生时她不在家。
3. 3. Reality is that we have to face the harsh realities of life.
   现实是我们必须面对生活的严酷现实。