没人会相信一只海狸能有意识地去权衡每个要素的利弊。
No one believes a beaver consciously weighs the pros and cons of each of these elements.
确认用户——一项评估的每个要素都必须设计来为某个特定用户收集信息。
Identify the UsersEvery element of an assessment should be designed to collect information for a specific user.
产品定义三要素：商业、代码及像素。每个要素在产品决策中都有发言权。
Three elements define a product: the business, the code and the pixels. Give each a voice in all product decisions.
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