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- Objective To introduce the structure and operating principle of a laser optometer for dark focus(DF). 目的:介绍了暗焦点检查仪的结构原理。
- Objective To introduce the structure and operating principle of a laser optometer for dark focus (DF). 摘要目的：介绍了暗焦点检查仪的结构原理。
- Conclusion The laser optometer for dark focus can be used for further study relating to the aviation vision. 结论：可用于航空视觉方面的深入研究。
- Objective To explore the change of dark focus after Coriolis acceleration stimulation. 目的观察人体受科里奥利加速度作用时眼暗焦点的变化。
- Methods Infrared and vernier means were used in the examination of dark focus.The stability, relationship between dark focus and refractive error were studied. 方法：主要用激光散斑法和游标法进行暗焦点检查，并在与屈光不正的关系及仪器的稳定性进行了应用研究。
- I groped for the light switch in the dark room. 我在黑暗的房间里摸索着找电灯开关。
- We started early in order to arrive before dark. 为了在天黑前到达，我们很早就动身了。
- Her sublimate future husband will be tall, dark, and handsome. 她理想化的未来丈夫将是身材高大，皮肤浅黑，相貌英俊。
- He was too shortsighted to focus on the object. 他由于近视过深而无法把视力焦点对准在该物体上。
- He always wants to be the focus of attention. 他总想成为注意力的焦点。
- The change of dark focus following Coriolis acceleration stimulation 科里奥利加速度对人眼暗焦点变化的影响
- The thief slunk down the dark alley. 那个贼偷偷钻进黑胡同里。
- I grope for the light switch in the dark room. 我在黑洞洞的屋里摸索著寻找电灯开关。
- You should focus your attention on your work. 你应该把注意力放到工作上。
- The focus on my camera isn't working properly. 我的照相机上的调焦装置有毛病。
- He felt along the wall in the dark for the door. 他在黑暗中沿墙壁摸索着找门。
- It is too dark outside to allow of walking. 外面太黑了，不能出去散步。
- Dark clouds are a sign of rain or snow. 乌云是雨或雪将至的预兆。
- In tonight's programme our focus is on Germany. 在今天晚上的节目中我们重点介绍德国。
- Mr.Green dressed up as a policeman in dark glasses. 格林先生伪装成一名戴墨镜的警察。
