You can focus on your core business requirements and mix in the additional functionality you need - searching, authentication, alternate presentation layers, and more - from external resources.
这样您就可以将更多的精力用于核心业务需求，在需要的时候，从外部资源加入所需的额外功能—查询、认证、备用表示层等。
It can be useful to filter out external stimuli if you are writing an email in a noisy coffee shop, for example, or are searching for a camouflaged insect in a rainforest.
例如，要是你在在嘈杂的咖啡馆里写一封电子邮件或在雨林里搜寻一只伪装的昆虫，能过滤掉外部的刺激就很有用。
Begin to realize that when things in the external field become chaotic and stressed, our minds like to pull us even more externally searching for answers.
当开始意识到外面的一切正变得混乱不堪、给人巨大压力的时候，我们意识里喜欢把自己推到更外面的地方去寻找答案。
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