in matter of

例句：

1. 1. In mattersof money, we must be very careful.
   在金钱问题上，我们必须非常小心。
2. 2.The matter of the investigation is still under discussion.
   调查的事项仍在讨论中。
3. 3. He decided to take action on the matter of the sale.
   他决定对销售问题采取行动。