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окруженный темно-синим кольцом

Ἓν οἶδα, ὅτι οὐδὲν οἶδα –> I know only one thing, that I know nothing | all I know is that I know nothing.
Diogenes Laertius, Lives of the Philosophers, Book 2 sec. 32.

Russian > Greek

окруженный темно-синим кольцом = κυανάμπυξ

(Translation based on the reversal of Dvoretsky's Ancient Greek to Russian dictionary)