集中双元音 Unit Nineteen ; Unit Twenty ; Unit Eighteen ; the centering diphthongs
双眼集中 binocular flicker ; Binocular focusing
双连接集中器 DAC
双车道集中式车库管理 Dual-lane concentrated garage management
双重非集中F分配 Double noncentral F distribution
双向连接集中器 Dual Attachment Concentrator
单连接/双连接集中器 Single Attachment Concentrator/Dual Attachment Concentrator
关于人的利手习惯的传统观点是，利手习惯与大脑的双侧专门化有关，而语言处理功能集中在大脑的左侧。
The orthodox view of human handedness is that it is connected to the bilateral specialization of the brain that has concentrated language-processing functions on the left side of that organ.
有时候把所有事情放一边，穿上一双好鞋然后出门，是一个去除心烦意乱，腾出时间来进行集中学习的好方法。
Sometimes just dropping everything, putting on a good pair of shoes, and heading out the door can be the surest way to cut the distractions and free up time for focused learning.
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.
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