英仙座紧随仙后座之后.Perseus the Hero follows Cassiopeia across the night sky.直到仙后座升到北极星的正上方,猎户座才会出现在天空中.Orion won't rise until Cassipeia swings above Polaris , the North Star.说明: 我们银河系的心脏与魂魄是否在仙后座之内?Explanation: Is the heart...
自动阻风门尽管在细节上有所不同,但其设计是相仿的.The automatic choke devices are all similar, although they vary in detail.这种阻风门的部分开启可以防止混合气过浓.This partly opens the choke so that an overich mixture is prevented.其作用与上面讨论过的其它自动阻风门相似.The action is...