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
ης (ἡ) :région de Thrace.
-ης, ἡBiblina comarca del sur de Tracia, St.Byz., cf. Βιβλία.