一把 钥匙 开
One key opens
以上为机器翻译结果，长、整句建议使用 人工翻译 。
到了楼梯顶上，他又从衣袋里取出另外一把钥匙，用来开另一扇门。
At the top of the stairs he drew from his pocket another key, with which he opened another door.
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第二是一把开现实之门的钥匙。
The second is a key to open the door to reality.
这些钥匙哪一把也开不开这个门。
None of the keys would open the door.
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