incidental matter

例句：

1. 1. The meeting was held in an incidental location.
   会议在一个偶然的地方举行。
2. 2.Incidentals are items that are not essential to the functioning of a machine.
   非必需物品是机器运行所必需的。
3. 3.Incidentals can be found in many different places, such as on the floor or in a drawer.
   非必需物品可以在很多地方找到，比如地板上或抽屉里。