名词 flash bulb:

1. a lamp for providing momentary light to take a photograph

flashv.闪光；闪现；掠过；忽然...；亵渎性暴露n.闪光（灯）；恍然大悟；一刹那；闪现；[计算机]Adobe公司的动画技术flashgunn.闪光操纵器；闪光枪

1. There's a built-in flash in this camera.
   这架照相机有一个内藏闪光灯。
2. I couldn't get the flash to work on my camera.
   我弄不亮我照相机上的闪光灯。