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 ...
Sensing she was on shaky ground, Marie changed the subject.感到自己的观点站不住脚，玛丽于是换了个话题。He gallantly kissed Marie's hand as we prepared to leave.我们准备离开的时候，他非常有礼貌地吻了吻玛丽的手。Marie seemed to revel in his old-fashioned chivalry....
“我要是那样做了就好了，”菲尔·乔丹说道，又像往常一样消沉起来。"I wish I did," said Phil Jordan, relapsing into his usual gloom.冬季天短，有些人会变得抑郁消沉。When the days shorten in winter some people suffer depression.我逐渐消沉了。I slid into a depression....