“勃起”造句

勃起是使你变成吸血鬼唯一的办法吗 ?
Getting hard was the only case for you to turn to a vampire?

他曾勃起了一回, 不过又软下去了.
He had one hard on, but it faded out.

唯一能够永远毁勃起对我来说是压力.
The only thing that's ever ruined an erection for me is stress.