n.[U][C]

1. 器械，仪器；设备，装置
   They have installed wireless apparatus on board.

   他们已在船上安装了无线电设备。

2. （人体）器官
3. 机构，机关，政党组织
   The city's security apparatus needs reforming.

   这个城市的治安机构需要改良。

n.

1. the technical equipment or machinery needed for a particular activity or purpose.
2. a complex structure within an organization:
   the apparatus of government.
3. (also critical apparatus, apparatus criticus) a collection of notes accompanying a printed text.