First of all, we introduce the typical MAC protocols in WSN and their energy-saving mechanisms. Then a detailed introduction to S-MAC is given, which is mainly designed for WSN.

论文首先对典型的MAC层协议和节能机制进行了介绍，并详细分析了S - MAC的能量消耗和节能机制，指出了该协议中存在的问题。

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It? S not a formal specification, but a readable introduction to each language feature.

它并不是一个标准规范，而是一本介绍每门语言特性的可读书籍。

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The introduction of the formal traces between the business and the system models allow development to understand the impact on the system (s) caused by a change in the business needs.

业务与系统模型间形式化跟踪的引入可以让我们理解业务所需的改变对系统的影响。

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His eighteen sixty-six painting "Yosemite Valley" gave many people on the East Coast their first introduction to California's beautiful mountain area.

VOA: special.2009.05.01

I see this as a course that's an introduction to the literature of a period, to modern poetry.

我觉得，这只是一门引导性课程,引导大家关注某一时期的文学创作和现代诗歌。

耶鲁公开课 - 现代诗歌课程节选

It's in this light that the introduction, I think, of Galileo in this simile starts to make a little more sense.

就此而论，这个比喻中，关于伽利略的介绍开始有了点意义。

耶鲁公开课 - 弥尔顿课程节选

Singh s introduction to GE s legendary CEO Welch came in 1989, when the company was still scoping out India.

FORBES: Pay Dirt

But it was the essence of Mr Rennie's introduction to Nick Clegg - and of Mr Clegg's address itself.

BBC: Nick Clegg

Yet it remains the most sophisticated but accessible introduction to Duchamp's motivation, evolution, imagery and intellectual sources.

WSJ: John Golding | Cubism's Vasari | By Elizabeth Cowling