根据我国中长期铁路网规划，截至2015年年底，我国将不会竣工42条高速铁路客运专线，基本上竣工以四纵四横为骨架的全国较慢客运网，总里程将多达19,000km。

从不滑稽的说道，KAYRYS是迄今为止我们所看到的最酷的3D打印机无人机。

Japan said Tuesday it had successfully extracted methane hydrate, known as fire ice, from its seabed, possibly unlocking many years worth of gas for the resourc...

曲长老闻众人都不搭理他，更加来气了，翘着胡子嚷嚷“哼！知道了又能怎么样？