名词
中文翻译：双凹透镜
同义词：
['concave lens', 'double convex lens例句：1. The double concave lens is used to focus light onto a screen.（双凹透镜用于将光线聚焦到屏幕上。）']
例句：
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1. The double concave lens is used to focus light onto a screen.
双凹透镜用于将光线聚焦到屏幕上。
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2.The double concave lens was designed to improve the quality of images.
双凹透镜被设计来提高图像的质量。
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3.The double concave lens is commonly used in microscopes to magnify objects.
双凹透镜在显微镜中被广泛使用来放大物体。