Battle of baghdad ( 1258 ) - mongols overrun baghdad , burning it to the ground and killing large numbers of citizens ( estimates range from 10 , 000 to 800 , 000 ) 1258年的今天，巴格达之战（ 1258年） ? ?蒙古人蹂躏巴格达城，将整座城付之一炬并杀戮大量的平民（据估计人数从1万人到80万人之间） 。
Scientists are unsure how many cells exist in the human body ; estimates range from 10 to 100 trillion . but you once existed as a single cell - for about half an hour 科学家们还不能确定，究竟有多少个细胞存在于人体内，估计大约有10至100万兆不定。但，你曾以一个单细胞的形式存在，而仅是半小时而已。
And also expounding that the first - fight - time can give explanation to the advanced techniques , the estimating ranges of first - fight - time in alcc estimating are expanded . the type - changed index and type - difference are selected as dummy variables . it has discussed mearsursion of type - changed index , and three criterions and three methods to set models including the dummy variable are got 说明性变量选取：说明性变量的选取基于费用因子分析，特别讨论了首飞时间对费用预测的影响，论述了首飞时间能对技术先进性作出说明，拓宽其在费用预测中的作用，选取改型指数虚设变量，研究了改型的量化方法，提出了判别准则和实现方法。
The 2016 estimates ranged from 85 to 164 thousand vehicles per day the medium assumption used in most tests was 120 thousand vehicles per day . almost all of the variations in volume was forecast for the two new crossings , the lingdingyang bridge 13 to 32 thousand vehicles per day and the shenzhen western corridor 35 to 95 thousand vehicles per day 到了2016年，每日的汽车流量预计会达到85 , 000至164 , 000架次（大部分测试所采用的中增长假设方案为每天12万架次） ，而预测的车流量主要是集中在两条通道上：伶仃洋大桥（ 13 , 000至32 , 000架次）及深港西部通道（每日35 , 000至95 , 000架次） 。
The 2016 estimates ranged from 85 to 164 thousand vehicles per day ( the medium assumption used in most tests was 120 thousand vehicles per day ) . almost all of the variations in volume was forecast for the two new crossings , the lingdingyang bridge ( 13 to 32 thousand vehicles per day ) and the shenzhen western corridor ( 35 to 95 thousand vehicles per day ) 到了2016年，每日的汽车流量预计会达到85 , 000至164 , 000架次（大部分测试所采用的中增长假设方案为每天12万架次） ，而预测的车流量主要是集中在两条通道上：伶仃洋大桥（ 13 , 000至32 , 000架次）及深港西部通道（每日35 , 000至95 , 000架次） 。
