But don't worry about it 但是不用担心
Some people would think so, but don't worry about it.
有些人也许会这么想,但不必为此太操心。
But don't worry about it, it's not, I'm just using it because it's a simpler example than the one I really want to get to, which is knapsack.
但是别担心,我讲这些是因为它比我,真正想讲的问题简单一些,我想讲的是背包问题。
You might notice that Photos are fetched with a Key in findById, but don't worry about it: For the purpose of this article, just think of Key as a wrapper around the id field.
您可能注意到 Photo 是在 findById 中通过一个 Key 获取的,但是请不要担心它是怎么获得的:在本文中,您只需要将 Key 看作是封装的 id 域。
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