Macfarlane compares the puzzle to a combination lock.
麦克法兰把这个难题比作一把密码锁。
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。
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。
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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