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| once; in a while (zeev); on one occasion (We do not normally use could to say that somebody did something on one occasion. Instead, we use other expressions: I managed to run 10km yesterday in under an hour, Swan, PEU Alexander Demidov) | |||
| singly | |||
| in a scattering medium, light that has already been scattered once is scattered again | |||
| один раз: 449 a las frases, 60 temas |