三叶形装饰或图案。
三叶形装饰或图案。
通过先驱体转化法，制备出三叶形、三折叶形和T形截面碳化硅纤维。
Trilobal, swirl-shaped and T-shaped SiC fibers were prepared from precursor polymer.
掺入的三叶形聚丙烯单丝纤维长度越长，水泥砂浆的抗干缩开裂性越好；
The longer the length of trefoil polypropylene filament fiber, the better the anti-dry-shrinkage cracking property of cement mortar.
圆形横截面纤维在棉网和棉条中，比三叶形横截面纤维能产生较大的粘著作用。
It was found that fibers of circular cross section produce greater cohesion in webs and slivers than do trilobal fibers.
方法：对56例各种原因造成的颌面部较大面积的软组织缺损创面采用三叶形局部皮瓣进行修复。
Methods 56 patients with large area of maxillofacial soft tissue wounds caused by various reasons were cured with trefoil local flaps.
结论：只要供区条件良好，三叶形局部皮瓣修复颌面部较大面积软组织缺损是一种效果优良、安全可靠的方法。
Conclusion as long as the flap donor site is in good condition, the application trefoil larger flap to repair maxillofacial soft tissue defects is a effective, safe and reliable method.
一个新的系统分三组进行了测试，第二组(里塞尔0与封闭三叶形软骨和里塞尔1)能够最佳预测400至425之间的数字骨龄评分。
A new system with three groups was tested, and the second group (Risser 0 with closed triradiate cartilage and Risser 1) was the best predictor of a digital skeletal age score of between 400 and 425.
按照数学家们的分类，三叶形是最简单的纽结。 所谓纽结，它是三维空间中不与自己相交的封闭曲线，或者说是三维空间中与圆周同胚的图形。
The trefoil is the simplest knot in mathematicians' classification.
例如，1519年10月，巴布尔和朋友骑马去Istalif：“草坪是三叶草形的，石榴树镀上了秋天的金黄色，果实全红。”
In October 1519, for instance, Babur rode out to Istalif with friends: “Its lawns were one sheet of trefoil; its pomegranate trees yellowed to autumn splendour, their fruit full red.”
例如，1519年10月，巴布尔和朋友骑马去Istalif：“草坪是三叶草形的，石榴树镀上了秋天的金黄色，果实全红。”
In October 1519, for instance, Babur rode out to Istalif with friends: "Its lawns were one sheet of trefoil; its pomegranate trees yellowed to autumn splendour, their fruit full red."
提出了基于六边形格网的三叶节点管理与瓦片编码的基本思路，确立了球面不同实体的六边形格网表达模式。
The essential clew of managing the three leaves nodes and tiles code is put forward based on hexagonal grid, and the hexagonal grid expression modes of different spherical entities are established.
提出了基于六边形格网的三叶节点管理与瓦片编码的基本思路，确立了球面不同实体的六边形格网表达模式。
The essential clew of managing the three leaves nodes and tiles code is put forward based on hexagonal grid, and the hexagonal grid expression modes of different spherical entities are established.
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