Its execution mechanism is pattern matching. The paper focuses the discussion on the improvement to bottom-up tree pattern matching. Our system has quick response time and strong descriptive power.

本文介绍该语言的一个实现系统，该系统是以方程逻辑为语义基础，模式匹配为执行机制，本文讨论了自底向上模式匹配方法及其改进，整个系统具有时间响应快、描述能力强的特点。

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He said, "We continue to expect economic activity to bottom out, then to turn up later this year."

VOA: special.2009.05.08

I'm going to begin at the bottom of 73: If you have your book, go ahead and open it up.

我将从73页最下面开始读：,如果你带了书，那么就打开书翻到那页。

耶鲁公开课 - 1945年后的美国小说课程节选

So, if we're talking about five different orbitals and we're talking about a ground state atom, we know that we just need to start at the bottom and work our way out up.

因此，如果我们要讨论的是,五个不同的轨道且是属于一个基态原子的话，我们知道，我们只需要从最低的轨道,开始一个一个往上找。

麻省理工公开课 - 化学原理课程节选

Communities and local civil society organizations need to be actively involved in decision-making in order to generate bottom up demand for change and hold governments to account for public investment in water and sanitation.

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As the program developed, modules were continuously adjusted and the approach to implementing projects had to be modified to a bottom-up approach from top-to-bottom previously.

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We certainly need to solve it bottom up and not top down, like the board quotas tried to do.

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