在底片上把图像上部的这个不重要的细节涂抹掉.Block out this unimportant detail at the top of your picture.光对底片发生作用从而产生照片.Photographs are produced by the action of light on film.你拍过几张底片了?How many exposures have you made?...

“底片”的英语可以翻译为：negative，photographic plate，[化] negative film，negative plate ...