A DEM-based road design system named Roman CAD is introduced. It combines the intersection point method ( IPM), building block method ( BBM) and many other design methods together to facilitate the design process and meet the needs of different design habits.

After tons of housework, I was lazy in bed in the midnight watching TV while chatting with him via BBM.

夜半，百无聊赖的懒在床上看电视，有一搭无一搭的和他用黑莓短息聊天。

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But allowed to roam free, BBM could possibly survive as a separate entity--a slim chance, but a chance nonetheless.

但如果让其自由发展，BBM或许能够以一个独立实体的形式存活下来——虽然机会很小，但总算还有希望。

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Internally, executives referred to the unit as BBM Inc. The messaging app's prospects routinely came up in news about possible BlackBerry buyers.

每当有黑莓潜在买家的消息出现，这一通讯应用的前景也都会照例被提及。

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For years, BBM was one of the most popular instant-messaging tools in several countries, particularly in the developing world. In fast-growing countries like Indonesia and Nigeria, BBM dominated the messaging landscape. Pop stars wrote songs about it.

多年来BBM在一些国家（尤其是发展中国家）一直是最受欢迎的即时通讯工具之一，在印度尼西亚、尼日利亚等快速增长的国家中称雄于通讯软件版图，甚至有流行歌手为其写歌谱曲。

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John Chen, BlackBerry's chief executive, has said he plans to make BBM a more enterprise-focused messaging tool, though he hasn't provided any details about how he plans to do this.

黑莓首席执行长程守宗（John Chen）曾表示他计划将BBM打造成为一个更侧重企业服务的通讯工具，不过他并未给出其计划的具体内容。

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BBM, with its 60 million users, is arguably the most buoyant thing in Blackberry's sinking consumer mobile division.

BBM约有6000万用户，在黑莓日渐衰退的消费者移动部门，BBM无疑最有前途。

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But there is one consumer-focused feature that Blackberry offers that no other handset maker or mobile platform has--its Blackberry Messaging Service ( BBM).

不过，黑莓有一个消费者导向的功能，是其他设备制造商或移动平台无法提供的——黑莓信息服务（BBM）。

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If BBM attracts enough iOS and Android users it could eventually become a sweet advertising portal for the company--launching Blackberry as a player in the mobile advertising market.

如果BBM能吸引足够多的iOS和安卓用户，其将成为公司非常可靠的广告平台——帮助黑莓进军移动广告市场。

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Conditional stability of the solitary wave solutions to BBM type equations and BBM-Burgers type equations

BBM型方程与BBM-Burgers型方程孤波解的条件稳定性

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Blackberry has confirmed to Fortunethat BBMs sent through the iOS and Android apps will travel through its servers and thus will have the same security perks as BBM messages sent between Blackberry users.

黑莓已向《财富》杂志（Fortune）确认，通过iOS与安卓版BBM应用发送的信息也将经由其服务器发送，因此与黑莓用户发送的BBM信息同样安全。

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Because the noise term of the model includes more uncertainties than that of BBM, the model can provide fast and preliminary estimations on ecological instream flow requirements.

但由于模型的噪音项包含的不确定性较构造块方法更多，因此模型适用于对河道内生态需水量进行初步快速的预测。

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Whatever BBM's future, investors think there's an upside for BlackBerry.

先不管BBM的未来如何，反正投资者是在看好黑莓。

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It is unclear what the future holds for Blackberry, but the company clearly feels that the potential benefits gained from allowing BBM to grow outside its own platform make up for any potential loss in handset sales.

黑莓的未来并不明朗，但很明显，公司认为，允许BBM在其自有平台之外发展可能带来的好处，足以弥补硬件设备销售的减少。

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Explicit and Exact Solutions to the Burgers-BBM Equation

Burgers-BBM方程新的精确解

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BBM usage has exploded in many countries in recent years, with volumes increasing 500 per cent.

近几年BBM的使用量在许多国家出现爆炸式增长，使用量增幅达500%。

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BBM has around 80 million monthly actives users, about half of whom don't use the app on BlackBerry's smartphones. ( In 2012, there were 55 million monthly active BBM users on BlackBerry devices).

而BBM每月活跃用户约8000万，其中约一半用户不在黑莓的智能手机上使用这款应用（2012年每月全球约有5500万活跃用户在黑莓设备上使用BBM）。

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Nevertheless, BBM does have a couple things going for it that other messaging apps don't.

不过，BBM确实有几项其他短信应用无法媲美的优势。

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BBM touts its ability to set up Group chats of up to 30 people, but WhatsApp can do that and so can GroupMe, which is all the rage on college campuses these days.

BBM的卖点之一是能够支持最多30人的群组聊天，WhatsApp和GroupMe同样能够做到。GroupMe目前在大学校园非常流行。

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Still, even as BlackBerry's core smartphone business was crumbling, BBM was considered a bright spot.

尽管黑莓的智能手机核心业务处于困境，BBM却仍被视为该公司业务的一个亮点。

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safety limit switch for elevators

电梯极限安全开关

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