He focused the sun's rays on a paper with a burning glass.

他用一面凸透镜把阳光聚焦在纸上.

《简明英汉词典》

He focused the sun's rays on a paper with a burning-glass.

他用一面凸透镜把阳光聚焦在纸上。

辞典例句

A convex lens is used to concentrate rays of light.

凸透镜用于聚集光线.

辞典例句

He polished the convex lens of his telescope.

他擦亮了凸透镜的望远镜.

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Two kinds of convex lens which make parallel rays converge to the focal point are given.

本文给出两种能使平行光严格聚焦于一点的凸透镜.

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Conclusion Wearing lower degree convex lens can reduce incidence rate of myopia in primary school students.

结论配戴低度凸透镜可降低小学生近视的发生率.

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Require to import 30 cm, 45 cm, 60 cm, 90 cm convex mirrors for south africa market.

南非市场需进口30厘米 、 5厘米 、 0厘米 、 5厘米的凸透镜.

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Olafur Eliasson , The Organic and Crystalline Description, light project, water - effect machine, yellow and blue filters, mirror.

奥拉维尔·艾利亚松,《有机物与水晶描绘》, 光控项目, 水效应装置, 黄色与蓝色滤镜, 凸透镜.

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He focused the sun's ray on a piece of paper with a burning - glass.

他用一面凸透镜把阳光在纸上聚成焦点.

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Wearing lower degree convex lens can reduce incidence rate of myopia in primary school students.

配戴低度凸透镜可降低小学生近视的发生率.

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