为了使压力能够均匀分布，树会在承重最多的位置增加材质；而骨骼则会从那些不必要的位置去掉多余的物质，以此来减轻骨骼框架的重量。

To distribute stress uniformly, trees add wood at the heaviest load points. Bones remove material from areas where it isn't needed to lighten skeletal frameworks.

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为何如此：两个原因，事实上：其一蚂蚁不喜欢闻到醋味，其二是这样可以去掉蚂蚁爬过路径上的气味，使它们失去四处走动的路径。

Why This Works: Two reasons, really: ants hate the smell of vinegar, and it removes the scent trails that they use to get around?

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在Spring的精神中，它去掉了一个API，无意间却也使单元测试通知方法更简单。

In the spirit of Spring, it removes an API, incidentally it making it easy to unit test the advice method.

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