In a camera, light rays pass through a series of lenses that focus images onto film.In a healthy eye, light rays pass through the cornea and lens, which focuses images onto the retina, a layer of light-sensing cells lining the back of the eye.
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美
- 在照相机中,光线经过一系列的透镜,把图像聚焦在胶片上,在健康的眼睛中,光线通过角膜和透镜,把图像聚焦到视网膜上,而视网膜是一层排列在眼底的光敏单元。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries