以下为句子列表：
英文: Application and development of the bifocal lenses design
中文: 双焦镜片的设计、应用和开发
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英文: Clinical Application of Bifocal Right Ventricular Pacing
中文: 右室双部位起搏的临床应用
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英文: Design of a refractive/diffractive hybrid infrared bifocal optical system
中文: 折射/衍射混合红外双焦光学系统设计
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英文: Objective To assess the effect of QRS duration (QRSd) and cardiac function during right ventricular apex(RVA) pacing,right ventricular outflow tract (RVOT) pacing and right ventricular bifocal (RV-Bi) pacing.
中文: 目的比较右室心尖部(RVA)、右室流出道(RVOT)和右室双部位(RV-Bi)起搏的QRS宽度和对心功能的影响。
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英文: Objective: To study the effects of gradual distraction of growing bone (distraction osteogenesis) with bifocal distraction for segmental mandibular defect.
中文: 目的：观察自行研制的转移盘牵引成骨器（bifocal distraction osteogenesis）整复山羊下颌骨节段性缺损的治疗效果。
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