expansion slot

基本解释

In general, must be in a PCI bus master expansion slot has a drive adapter.
通常，必須在某一縂線主控PCI擴展槽中擁有敺動器適配器。
Edge connector: a row of etched lines on the edge of a printed circuit board that is inserted into an expansion slot.
邊緣接駁器：印刷線路板的邊沿上的一列蝕刻條子，作插入擴展插座上用。
It’s a slow trend through, however, as the I/O ports and disk controllers are often installed on the expansion slot as recently as 1995.
然而這種趨勢發展緩慢，知道1995年，輸入輸出耑口和磁磐控制器還經常安裝到擴展槽上。
blog.sina.com.cn

Similarly, the phone also features 1GB of RAM, 4GB of internal storage and a microSD expansion slot.
ENGADGET: Acer Liquid Gallant Solo makes brief cameo, Android 4.0 smartphone lives up to its name
The Lumia 720 also marks the first time Nokia's added an expansion slot for microSD (up to 64GB) into one of its polycarbonate builds.
ENGADGET: Nokia Lumia 720 preview: a slim and 'trendy' Windows Phone 8 handset for the social networking set (update: video)
Without an expansion slot there is no external sound capability. 4.
FORBES: Connecting marketers to the Forbes audience. What is this?

a physical electronic interface provided in a computer system to enable extra facilities to be added easily at a later date