关于上代iPad，批评的焦点集中在其缺少前后摄像头和双核处理器，不过现在这些问题都解决了。
The most glaring criticisms had been the lack of front and rear facing cameras and a dual core processor, both of which have been resolved.
本文介绍了对激光双焦点技术的研究结果。
The result of research on laser dual foci technique is presented.
在古币的市场交易中，这类双旗铜币更是备受青睐，成为很多上海收藏大家们追逐的焦点。
In the old market, this kind of Double Flag coins is favored, become the focus of many of you who chase Shanghai.
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