Macfarlane compares the puzzle to a combination lock.

麦克法兰把这个难题比作一把密码锁。

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If you want to open the lock, you must know the combination.

如果你想要打开这把锁，你必须知道密码。

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I have a combination lock on my locker in the changing room.

我的更衣室的柜子上装着一把号码锁。

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I have a combination lock on my locker in the changing room.

我的更衣室的柜子上装着一把号码锁。

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