Skirts must be below the knee.

裙子要长过膝盖以下。

youdao

I've just below the knee.

我刚刚在膝盖以下。

youdao

Both legs are missing below the knee.

膝盖以下少了两条小腿。

youdao

Today,that is not enough any more." "When you want to buy the latest it bag, you also want to know how it is produced And that is the biggest change that we have seen in our business since the hem-lengths went below the knee."

VOA: standard.2010.01.31

The last bomb exploded near the man, blowing off his legs below the knee, authorities said.

CNN: India names Iranian suspects in Israeli car bombing

Ms. Rand, 52, had one leg amputated below the knee and remains hospitalized at Massachusetts General Hospital.

WSJ: In Boston, Families Grapple With Long Road Ahead

After treatment his left leg was amputated below the knee and he suffers form post-traumatic stress disorder.

BBC: Wounded Mike Goody aims for South Pole challenge