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

But it is in fact indicative of what's actually going on underneath the hood and for a forensic investigator to be honest and even problem set 5, it poses a potential wrinkle if those JPEGs, those photos we took are not contiguous back to back to back but are all over the place.

但是实际上就像那些法医调查员,所做的实质说明,其实对套题5也是如此，如果那些JPEG文件有问题，我们将其数据不能连续的,放回原来的地方，那么图像会呈现出波纹形状。

哈佛公开课 - 计算机科学课程节选