名词
中文翻译：小圆镜
同义词：
['mirror', 'reflector']
例句：
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1.The labret on the camera lens is designed to focus light onto the film.
相机镜头上的凸面镜设计用来将光线聚焦到胶片上。
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2. The labret in the mirror reflects the sun's rays back into the room.
镜子中的凸面镜反射太阳光回到房间里。
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3.The labret on the car's headlights helps to improve visibility at night.
汽车前大灯上的凸面镜有助于提高夜间的能见度。