plug-in

1. ADJ A plug-in machine is a piece of electrical equipment that is operated by being connected to an electricity supply or to another piece of electrical equipment by means of a plug. (指接上电源或另一电子设备就可以工作的) 插入式的; 带插头接点的[ADJ n]

...a plug-in radio. …一台可外接电源的收音机。

2. N-COUNT A plug-in is something such as a piece of software that can be added to a computer system to give extra features or functions. (计算机软件的) 插件[计算机]

Some websites make it seem like you need to download a plug-in or program to access the site. 有些网站设计得似乎需要下载一个插件或程序才能进入访问。