该方法既适于自治系统又适于非自治系统.Above method can be applied to both autonomous system and nonautonomous system.研究具有年龄结构的非自治的SIS模型.In this paper , we study a nonautonomous SIS model with age structure.研究了一类利用线性状态误差反馈控制方法耦合的非自治悬臂振动系统的全...
He thought for a moment, stroking his well-defined jaw.他摸着自己轮廓分明的下巴想了一会儿。Carla, curled up on the sofa, was smoking a cigarette and stroking her cat.卡拉正蜷缩在沙发上，一边吸着烟，一边轻抚着她的猫咪。No man can tame a tiger into a kitten by strok...
1941年，火车本可以由蒸汽机车拉动。In 1941, the train would have been pulled by a steam engine.机车建筑有限公司是该托拉斯的全资子公司。The Locomotive Construction Company Ltd is a wholly-owned subsidiary of the Trust.我将坐在机车后面的第三节车厢内.I'll be sitting in...