日落以后，我走到屋后泥泞的小路上，用长时间曝光拍下这张照片。

I went out to the dirt road behind the house and shot this using a long exposure, just after sunset.

youdao

你用这个技巧的时候同样会使用长时间曝光，所以你需要一个三脚架。

You'll use this technique in conjunction with using longer exposures in most situations, so you'll need your tripod.

youdao

当然用装在三角架上的照相机固定摄影，长时间曝光能拍到星星因地球自转而形成的同心圆轨迹。

Of course, with the camera fixed to a tripod, the stars themselves produce concentric trails in long exposures, a reflection of the Earth's rotation around its axis.

youdao