已经拆除了英语怎么说

已经拆除了可以用英文表示为 "has been dismantled"。

"Dismantle" 是一个动词，意思是拆开或拆除，例如：

The old building has been dismantled to make way for a new development. (这座旧建筑已被拆除，为了腾出地方建新的建筑。)
We had to dismantle the engine to fix the problem. (我们不得不拆下引擎来修理问题。)

"Dismantle" 来自中文词汇 "拆"，并在英语中保留了其原有的意思。

其他一些相关的表达方式包括：

The structure has been taken down. (结构已被拆除。)
The device has been disassembled. (设备已被拆解。)
The machinery has been decommissioned. (机器已被停用。)