As my department's minimum length is 70 pages.

因为我们系的论文最少要 70 页。

Another point: paragraphs don't have a minimum length.

段落并没有最短的长度。

An extra point: there's no minimum or maximum length for a paragraph.

段落是没有最短或最长的限定的。

I've tried all that, but don't have enough to write the dissertation, as my department's minimum length is seventy pages.

这些我都试过了，但是不够写论文，因为我们系要求的最短要 70 页。

(Q4) Uh, I think I will just get the minimum length this time around.

男：（Q4）呃，我想这次我只会得到最小长度。