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1·The problem looks simple, but when you try to unlash it you'll find it's a real teaser.

这个问题看起来简单，但是你要“解开”它时你就会发现它还真是一道难题。

解开

1·The problem looks simple, but when you try to unlash it you'll find it's a real teaser.

这个问题看起来简单，但是你要“解开”它时你就会发现它还真是一道难题。