方法：回顾性总结65例保留瓣下结构二尖瓣置换术患者的手术护理。
将这里的弦图换为区间图或单位区间图，便得到路宽和带宽问题；
前言：目的：探讨保留瓣下结构二尖瓣置换术的护理配合。
然而传统的滚子链传动存在多边形效应和啮入瞬间的冲击效应，损害了传动的同步性与均匀性。
1·The warped phenomenon is mitigated when the chordal height decreases.
随着弦高的减小，翘曲现象减轻，渐呈准直线。
2·A polynomial algorithm to find the maximum induced forest of a strongly chordal graph is given.
文中同时给出了在强弦图上求最大导出森林的多项式算法。
3·There is no common normal in the conical involute gear and the fixed chordal tooth thickness can not be measured accurately because of the coexistence of helix angle and taper.
渐开线锥形齿轮由于同时存在锥度和螺旋角，使得其固定弦齿厚无法精确测量，也没有公法线。
4·We generated parametric curves in the normalized parameter field and planned the measure-points on parametric curves according to the chordal tolerance.
同时利用规范化参数域生成等参数线，并按照弦公差方法在等参数线上规划测量点；
5·Chordal deviation is the perpendicular distance between the actual curve and the approximating line segments.
圆弧可以大量短直线模拟，弦长偏差是圆弧与直线的垂直距离。
1·They're playing a chordal accompaniment against it.
钢琴演奏的和弦充当伴奏与小提琴呼应。
2·For decades to come, Brubeck's two-handed chordal playing and sparing use of syncopation would beautifully complement Desmond's floating and lyrical lines.
此后几十年合作生涯，布鲁贝克的双手和弦以及保守运用切分音的演奏风格，同戴斯蒙德流动而抒情的柔和声线交相辉映，配合默契。
3·The chordal and melodic structure is very representative of Harrison with his use of complicated progressions and twisted melodies.
这首歌的和弦与旋律结构是相当标准的哈里逊风格 - 擅长操弄复杂的乐曲进行方式及曲扭旋律。