The patient must re-enter a world full of problems and stresses.患者必须再次进入充满问题和压力的世界。The spacecraft slowed and began to re-enter the atmosphere.太空船减慢了速度，开始重返大气层。The force of friction affects the speed at which spacecraft c...
Just as darkness was falling , in flew the black thing with the five skeins of flax.天刚刚黑, 那黑东西就飞进来了,并带来了纺好的五绞线.The transformation frequency of flax hypocotyl was about 2 %.表明它们是转化植株,转化频率约为2%.Flax is used for making linen...
This paper introduces a rarely seen method of describing with diametral distance.本文介绍了一种鲜为人知的用直径距离描绘椭圆的方法.Meshing spur gears must have the same diametral pitch.互相啮合的直齿圆柱齿轮,必须具有相同的径节.Diametral pitch : the number of teeth ...