τὸ δ' ἐξαίφνης τὸ ἐν ἀναισθήτῳ χρόνῳ διὰ μικρότητα ἐκστάν → suddenly refers to what has departed from its former condition in a time imperceptible because of its smallness
η (ΑΜ μετρική)βλ. μετρικός.
μετρική: ἡ (sc. τέχνη) метрика, учение о стихотворных размерах Arst.
