压气机出口压力沿圆周方向接近于常数.The compressor - outlet pressure is nearly constant around the circumference.文中也包括了离心压气机设计的基本步骤.The essential design procedure about centrifugal compressor also included in the paper.活塞发动机和涡桨发动机的飞机有压气机来...
Below us you could glimpse the rooftops of a few small villages.我们可以瞥见脚下一些小村庄的屋顶。From the hill we looked out over the rooftops of Athens.我们从山上眺望雅典建筑的顶部。The army lifted people off rooftops where they had climbed to escape...
在古代，狗也与治病有关。Dogs were also associated with healing in the ancient world.他们认为古代希腊罗马是知识的重要发源地。They believed ancient Greece and Rome were vital sources of learning.铅是早在古代就已知的金属之一。Lead was one of the metals known to the anci...