我们试着用柴油机来带动水泵.We experimented with diesel engines to drive the pumps.用作柴油机的燃料可以分两大类.Fuels for diesel engines may be considered under two broad headings.在一侧有四台驱动发电机的小型柴油机.To one side are four small diesel engines for driv...
How did the dinosaurs die out?恐龙是如何灭绝的？...industrial dinosaurs.庞大陈旧的工业体系Recent, more dramatic use of CGI was seen in “Walking With Dinosaurs”.在纪录片《与恐龙同行》中可以看到最新的、更加生动的电脑特效技术。Ostriches are descendants of dinosaurs, and th...