2. When you are courting a nice girl an hour seems like a second. When you sit on a red-hot
cinder a second seems like an hour. That's relativity. —Albert Einstein.
当你追求一个漂亮姑娘的时候,一小时感觉上就象一秒钟,当你坐在一堆红热的焦碳上的时候,一秒钟就象一小时。这就是相对论——阿尔博特·爱因斯坦。
3. Take new built mine seam for example, expound the advantages of leaving roadway fashion of concrete coal refuse
cinder cement stone wall, and make analysis of technical economic.
以典型的新建煤矿煤层为例,阐述采用水泥煤矸碴胶泥砌筑石墙留巷方式的优点,并进行技术经济分析。