double-focus X-ray tube 双焦点X射线管
double-focus interferometer 双焦点干涉仪 ; 双重线精细结构
Double focus 出口日本大牌
double focus interference microscope 双焦点干涉显微镜
double focus tube 双焦点球管 ; 双焦点管
Double Dynamic Focus 双倍动态聚焦
Moreover a devise idea is put forward that hologram incorporates object lens that can adapt to the Panasonic's Double focus and give credible technologic guarantee and carry out product's simplification. In the information society, the new technique come on constantly.
后半部分对DVD的核心部分——激光头的工作原理及其满足高密度和兼容性要求的实现方法进行了详细阐述，并提出了适应松下两焦点光头的全息板与物镜一体化设计思想，为产品简单化的追求提供了可靠的技术保证。
参考来源 - DVD视频压缩技术及激光头的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
This study was to investigate whether the adolescent myopia can be controlled after they wear double-focus spectacles of near-distance reading addition.
配戴近距离阅读附加双焦点眼镜的近视青少年近视增长速度明显低于配戴单焦点普通近视眼镜的近视青少年患者。
Man is not a circle with a single centre; he is an ellipse with a double focus.
人并不是只有一个圆心的圆圈；他是一个有两个焦点的椭圆。
In reading, the main focus of the PISA survey, more than 19% of the Shanghai students attained the top two grades, almost double the proportion in the u.
在PISA重点考察的阅读项目中，超过19%的上海学生都取得了最高两级的得分。
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