尽管这是一本在所有相关方面都非常好的入门书，但它的主要贡献在于两方面的调查：用户和开发者。两者无论是深度和范围上都达到前所未有的。
Although the book is a good primer on all this, its main contribution consists of two surveys-one of users of software, the other of developers-that are unprecedented in both scale and scope.
她是一位母亲，她科学地记录着她的孩子们在所有关于物质、心理和精神等方面增长的相关信息。
She was a mother who scientifically recorded all pertinent information regarding the physical, mental, and spiritual growth of her children.
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