No other metal or artificial materials are used.
不使用其他金属或人造材料。
She said currently available treatment requires surgery and artificial materials and often results in imperfect outcomes.
她说目前有效的治疗要求手术及人工材料，而往往疗效不佳。
Negative refractive index materials are artificial materials with permittivity and permeability both negative within certain microwave frequency band.
负折射率媒质是一种人造媒质，在某一微波波段内其介电常数和磁导率同时为负值。
Objective To study in-vitro compatibility between artificial materials and tendon cells as well as the growth of the tendon cells on the artificial materials.
目的在体外培养的条件下了解人工材料与肌腱细胞的相容性以及肌腱细胞在人工材料上的生长情况。
Simpleness appears not only in the form of the building but also in the moderate application of the restricted assortment of the natural and artificial materials.
简单不但表现在建筑的形状，也表现在适度应用种类有限的自然和人工材料上。
Reconstruction with combined bipedicled myocutaneous flap and costal cartilage or artificial materials are better for severe laryngotracheal stenosis and large tracheal defect.
严重喉气管狭窄、闭锁或合并气管大面积缺损以双蒂肌皮瓣、复合肋软骨和人工气管环重建术效果较好；
Reconstruction with combined bipedicled myocutaneous flap and costal cartilage or artificial materials are better for severe laryngotracheal stenosis and large tracheal defect.
严重喉气管狭窄、闭锁或合并气管大面积缺损以双蒂肌皮瓣、复合肋软骨和人工气管环重建术效果较好；
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