appurtenance [əˈpɜ:rtɪnəns]

例句:

• Consequently, Navassa became an American appurtenance - not quite a territory but still indisputably American.
  因此, 纳弗沙成为美国属地,不完全是美国领土,但毋庸置疑的属于美国.
  
• Pressure Vessel's appurtenance and accessories : bursting discs, or safety valves, liquid level gages.
  压力容器: 爆破片或安全阀 、 液位计等.