The picture is a digital composite, a separate longer exposure added to an eclipse frame to capture the surrounding star field.

这幅图片是经过数码合成的，由一幅分开的长曝光照片和拍摄下周围星域的月食照片组成。

youdao

You'll quickly realize whether your shots are under or overexposed and whether the length of the exposure is long enough to let cars travel through the frame in the way that you want.

你就会很快发现你的拍摄是曝光过少还是过多，曝光时间是否够长到让车辆以你希望的方式驶过相框。

youdao

With a flashlight and some special tools, Hemingway can frame his shot on a tripod, set a long exposure and dance through the shot with his lights in hand.

这样的照片只需要一把手电筒和一些特殊工具就能完成，海明威在他的三脚架上选取好拍摄场景，将相机设置成长曝光模式，然后手里拿着手电筒在镜头里随意舞动。

youdao

The trick is to frame the shot and set the camera for a long exposure, then any bolts that appear in the frame will be captured in all their glory.

BBC: Lightning really does strike twice

Instead of trying to grab each frame in a single exposure, the scientist (unlike the entertainer) can wait as the data build up over time.

ECONOMIST: Researchers can now broadcast moving holograms