But as you probably know, a JPEG, a photograph, these are usually multiple megabytes these days which means there's a ridiculous amount of data still on that digital camera.

但是你知道，一个JPEG图片，通常是由几兆字节组成的,也就是说这些数据的大部分,仍然存在于数码相机中。

哈佛公开课 - 计算机科学课程节选