"extension" in Chinese (Simplified)
延长分机扩展
Definition
“Extension”可指在某物上增加空间或时间，比如楼房或截止日期，也表示一个大型电话系统中的额外电话分机。
Usage Notes (Chinese (Simplified))
常用于正式或技术语境，如“期限延长”、“楼房扩建”。电话中的“extension”特指分机号。也可指浏览器插件。不要与“expansion”混用（含义更广泛）。
Examples
The company built an extension to the main office.
公司为主楼建了一个**扩展部分**。
Can I get an extension on my homework deadline?
我可以延长作业的截止日期吗？
Please dial extension 104 to reach accounting.
请拨打会计部的**分机**104。
They just released a new browser extension that blocks ads.
他们刚推出了一款可以屏蔽广告的浏览器**扩展程序**。
My hair looks much longer after I put in these extensions.
我加了这些**接发**后头发看起来长多了。
Due to high demand, the festival received an extension and will run one more week.
由于需求旺盛，节日得到了**延长**，将再持续一周。