Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
Ruderschiff, navis, quae remis agitur – je nachdem es zwei oder drei Reihen Ruderbänke hat: biremis, triremis (mit u. ohne navis).
