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。
In cathode ray tube display, the continuation of light emission from phosphor after excitation by the electron beam.
在阴极射线管显示器中，用电子束激励后荧光物质光发射的持续现象。
ray take a gulp of coffee and rushed out of the room.
雷喝了一大口咖啡，接着便冲出了房间。
