相同的目录包括一种两极同心插头和插座。

The same catalogue included a type of two-pole concentric plug and socket.

youdao

使用一个简单的类比，您可以把扩展视为插头并把扩展点视为插座。

Using a simple analogy, you can think of an extension as a plug and an extension point as a socket.

youdao

但是，打个比方的话：所谓的扩展点就像是一个用电的插座而扩展就是那个插头。

However, as an analogy: extension points are like electrical sockets and extensions are like plugs.

youdao