Translation of optics in German

I hope my explanation was also clear that would say that for english verbs a to needs to be put from the selection list. Like: inhale would be 'to inhale' == 'inhalar'. The 'to' is taken from a selection list.
On the frozen lake, you can skate, but I would never dare it because it is far too dangerous. Who knows how thick the ice really is and how accurate the measurements are. It can break.
Your English seems to be good. Can I meet you? I made a German language course, but my vocabulary is very limited. Unfortunately I do not speak German well, but I'll give my best.