The bulk of this series covers different aspects of how you can allow design to emerge as you develop rather than setting it in stone before you write your first line of code.
在编写第一行代码之前，本系列的大部分内容将介绍如何伴随着开发展开设计(而不是一成不变)的各个方面。
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Mice in this case are the first line of experimentation — the scientists hope to then expand the research out into other animals that can produce milk in bulk, like goats and cows.
For the incumbent telecoms operators, however, the quadruple play is all about protecting their core business of fixed-line voice calls, which still accounts for the bulk of their revenues.