apparatus n. /instrument n. /device n. /appliance n.

apparatus主要指“器械，裝置，儀器，器官”;

instrument主要指“儀器，工具，樂器”;

device指“器具，裝置，儀表，手段”;

appliance指“器具，器械，家用電器等”。

例：The television men set up their apparatus, ready to film.

攝制組的人架好機器準備開拍。

All surgical instruments must be sterilized before use.

手術前，所有手術器械必須消毒。

The television receiver is an electronic device.

電視接收機是一種電子設備。

The kitchen is equipped with modern appliances.

廚房裝備了現代化的炊事用具。