英语翻译Onaverageforeveryfootofeditedfilm,youneedtwelvetimesasmuchuneditedfilmandthereforeyouhavetocompromiseand,ofcourse,discardsomeofit."youneedtwelvetimesasmuchuneditedfilm"这句不懂,

Question

英语翻译
On average for every foot of edited film,you need twelve times as much unedited film and therefore you have to compromise and,of course,discard some of it.
"you need twelve times as much unedited film" 这句不懂,

Answer 1

整段话的意思是：对于那些已剪辑的电影拷贝,你也要像对那些未剪辑的电影拷贝一样,平均要做（具体做什么我也不知道）12次,每一英尺都不能放过.这样,才能做到有的放矢,该删的删,该留的留.
至于你不懂的那一句,意思就是“要像对待未剪辑的电影一样,做上12次”.
不知我的回答你满意否?