骑自行车是一项不错的锻炼方式。它能使身体各部分的肌肉更强健。Cycling is good exercise. It strengthens all the muscles of the body.统一体总要分解为不同部分的.A unity invariably tends to break up into different parts.构成那部小说开头部分的几章特别好.The chapters that comprise the f...
Many jets have an afterburner.许多喷气机都有加力燃烧室.Fig . 16 - 6 illustrates a typical afterburner fuel control system.图16-6示出了一种典型的加力燃烧室燃油控制系统.Afterburner system is runing very smoothly.后燃加力系统运行平缓....