Question

this is the film.i told you about it.

Answer 1

意思是“就是这部电影,你以前和我说过的.”.

这是两个句子,后一句是由定语从句构成的句子,先行词是film,句中省略了关系代词which,原句应该是“That's right.This is the film which you told me about.”.因为关系代词Which在定语从句中作介词about的宾语,因此可以省略.