The guard stopped his humming and turned his head sharply.守卫停止了哼唱，猛地转过头。There was a low humming sound in the sky.空中传来一阵低沉的嗡嗡声。Within five hours, the equipment will be humming away again.用不了5小时，设备就又能嗡嗡地运转了。...
Kinematics and dynamics of mechanical systems including rigid bodies in plane motion.机械系统的运动学与动力学包括刚体的平面移动.The kinematics phase configures of different configurations are shown and analyzed.做出不同条件下,不同构态的运动相图,最后对相图做出分析.De...
They struggled to limit the cost by enforcing a low-tech specification.他们通过实施低技术规格拼命限制成本。These may be laudable aims, but by enforcing them at gunpoint another vitally important principle is lost.也许用心是好的，但若诉诸枪杆子则无法坚持另一个至关...
I think she will like this Chinese knot for her birthday.我想她会喜欢这个中国结作为她的生日礼物.Maybe she would like Chinese knot.也许她会喜欢中国结的.Where does Shijiazhuang sell Chinese knot rope?石家庄哪里卖中国结的绳子?...