The orbits of planets in the once popular geocentric Ptolemaic system are epitrochoids.曾经盛行的托勒密地心说体系里的行星轨道就是外旋轮线.Mars and Earth have orbits which change with time...火星与地球的运行轨道随着时间而变化。Other enumeration problems lead us to...
The simultaneous attack of erosion and corrosion quickens the destroy of alloy.腐蚀/冲蚀联合作用加快了合金的破坏.He quickens the indolent, encourages the eager, and steadies the unstable.他使懒惰的活跃, 使热心的获鼓励, 使摇摆者稳定.Good literature quickens...
用厌氧生物净化法净化此工艺废水,可使净化效率达到93%以上.The purificial to anaerobe. The purification rate could amount to more than 93 % by anaerobic method.通过对原设备的改造, 使净化系统与电炉同步运行率显著提高.Through reforming original equipment, the synchronous ration...