The freighter launched out,on a journey to the coast of Africa.货船启航，驶往非洲海岸。This freighter can sail for 15 days without docking.这艘货轮能够不停靠码头连续航行十五天.The freighter fouled its propeller in fishing nets.货船的螺旋桨被渔网缠住了。Twenty min...
Uracil -- a pyrimidine found in RNA that base - pares with adenine.尿嘧啶 -- 核糖核酸中的一种嘧啶,与腺嘌呤形成碱基对.The missile control system composed of two pares, the controller and the controlled object.粗略地看,导弹控制系统都是由控制器和被控对象两大部分组成的....
对于任何一种导弹的伺服系统来说,使它的重量为最轻和体积为最小,几乎是最主要的要求了.Minimum weight and volume are almost overriding requirements for any missile servo.战斗部是导弹的有效载荷, 即运载物.The warhead is the missile's payload, or cargo.在较远的距离处较低的导弹速度也许将不会限制导弹的作...