plug-in

名词 plug-in:

1. a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities
   同义词：circuit board, circuit card, board, card, add-in

动词 plug-in:

1. plug into an outlet
   同义词：plug in, connect

plug-in

adj.（形容词）
Designed to be plugged in to an electric circuit:
插入式的：被设计插入一条电路的：
例句：
a plug-in game.
一个插入式的游戏