环面可由矩形把其两对对边分别重叠起来而得到.A torus can be obtained from a rectangle by identifying opposite sides.所以就拓扑学而言, 球和环面是不同的东西.Topologically, then, a sphere and a torus are distinct entities.平面包络环面蜗轮副具有优良的啮合性能,它是一种具有广阔应用前景的传动形式.Worm ...
Once at Elgin day-trippers visit a number of local sights.一到达埃尔金，一日游的游客就参观了一些当地的风景名胜。Among the most spectacular sights are the great sea-bird colonies.庞大的海鸟群是最壮观的景象之一。We just do not set our sights high enough.我们设定的目标不够高远...
He was greeted by the chant of "Judas! Judas!".人们看见他就反复不停地喊：“犹大！犹大！”Her father had been a mer-chant seaman, absent for much of her child-hood.她爸爸曾是商船船员，在她童年的大部分时光里都不在她身边。Sohar passed the headland at Muscat to a chant.在歌声...
He complained a little of a nagging pain between his shoulder blades.他有几句提到说肩胛骨之间一直在疼。Top - quality steel blades are used to guarantee smoothness grooving.选任优质锯齿型开槽刀片,保证开槽光洁度.Brisk brave brigadiers brandished broad brigh...
Anteverted uterus with multiple uterine myomas, the largest one ( 7.5 cm ) at superior margin of uterine body.子宫前倾且有多个子宫肌瘤, 最大的 ( 7.5公分 ) 位于子宫体的上缘.Sometimes the original abortion was done so badly that the uterus prolaps...
He was internally disturbed to hear of her illness.听说她病了,他内心很不安.Her argument is internally inconsistent.她的论点本质上是相互矛盾的.The argument is internally contradictory.论据本身自相矛盾....
Through use of transparent overlays solutions to acid and base equilibria can be obtained rapidly.使曲线明显重迭,可迅速得到酸和碱平衡的分解.Also, on the basis of this knowledge, chemical equilibria can be predicted theoretically with great ...