1. A dark green, round biconvex tablet with opaque coating.
深绿色，圆形不透明涂层双凸片。
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2. This paper, in detail, introduced how to study the rule of image construction for biconvex lens by using the method of vision difference.
本文详细地介绍了如何运用视差现象研究凸透镜的成象规律。
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3. The rule of adaxial image formation is studied, of the transmission light and reflected light through the two optical surfaces L_1 and L_2 of the biconvex lens.
4. The optical aberration difference between the biconvex Fresenl lens and the plane-convex Fresenl lens was investigated by designing a large aperture Fresenl lens.
通过一个大尺寸菲涅尔透镜的设计，比较了曲面菲涅尔透镜和平面菲涅尔透镜在光学像差方面的差异。
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5. The optical aberration difference between the biconvex Fresenl lens and the plane-convex Fresenl lens was investigated by designing a large aperture Fresenl lens.
通过一个大尺寸菲涅尔透镜的设计，比较了曲面菲涅尔透镜和平面菲涅尔透镜在光学像差方面的差异。
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用作形容词 (adj.)
Achenes included in persistent perianth, dark brown, shiny, ovoid, biconvex, smooth. 瘦果在宿存花被内藏，暗褐色，发亮，卵圆形，两面凸，光滑。
