Hi. I have a little language problem. I'm studying in Germany, and my German is... nicht sehr gut, so I sometimes have problems understanding the exercises. The one I'm having issues right now has a part which says einen höchstens explizit zeitabhängigen Ope-rator im Schrödingerbild. My translation for this is "An at most explicitly time-dependent operator in Schrödinger picture." This doesn't make any sense: how can a Schrödinger-picture operator be time dependent? And what does it mean by "at most explicitly" Thank you for your time. PD: if you happen to speak German I'd would appreciate if you checked my translation. PPD: I know I could simply ask the teacher, but... I should have made this exercise way earlier, and I'm kind of ashamed to openly tell him that I am doing it now, so I'd like to avoid it if possible.