扩展槽的英文：
expansion slot

参考例句：

Make sure the graphic card is seated properly in its expansion slot.
再检查图形卡是否在扩展槽中插牢。

expansion是什么意思：
n. 扩大，膨胀；扩张物

It's the expansion of a river.
这是河流的延伸部分。

This is nothing but the binomial expansion.
这不过是二项展开式。

They have an expansive grassy play area.
他们有一片广阔的游乐草地。

They have played an expansive style of rugby.
他们采用向外展开打法打了一场橄榄球。

That was a vast expanse of grassland.
那曾是一片广阔的草原。

slot是什么意思：
n. 狭槽，水沟；时段，位置
v. 插（入），放（入）

The bolt slotted smoothly into place.
插销很容易就插上了。

He dropped a coin into the slot and dialed.
他往投币孔里投了一枚硬币，然后拨了电话。

Please slot the edge of the panel into the groove.
请把嵌板的边插进槽里。

You love Las Vegas, slot machines, and blackjack.
你喜欢拉斯维加斯,硬币机和二十一点。

She placed her card in a slot on the outside the bank.
她在银行外面把她的卡片塞进一条窄缝。