Sentence examples of "once" in English

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I remember seeing her once. Recuerdo haberla visto una vez.
Having seen him before, I recognized him at once. Como ya lo había visto antes, lo reconocí inmediatamente.
She was late once again. Ella llegó tarde una vez más.
Where the frontier of science once was is now the centre. Donde antes estaba la frontera de la ciencia, ahora se encuentra su centro.
I have visited Paris once. He visitado París una vez.
Once, when I went to my friend Kawai's house, he fired a pistol. He thought it was not loaded and pointed it at my mouth, but it was and the bullet grazed my ear before hitting the closet. Una vez, cuando fui a la casa de mi amigo Kawai, éste disparó una pistola. Pensó que no estaba cargada y me apuntó a la boca, pero lo estaba y la bala rozó mi oreja antes de impactar contra el armario.
I swim once a week. Yo nado una vez a la semana.
Angry at Leif Ericson for stealing his thunder 500 years before, Christopher Columbus once wrote a rigorous mathematical proof that showed how Ericson had never actually been to North America. Unfortunately, the proof was too difficult for even the brightest mathematicians to understand. Enfadado con Leif Ericson por haberle robado el descubrimiento 500 años antes, Cristóbal Colón una vez escribió una rigurosa demostración matemática que demostraba que Ericson nunca había estado realmente en América del Norte. Desgraciadamente, ésta era demasiado difícil de entender incluso para los matemáticos más brillantes.
You are only young once. Sólo se es joven una vez.
Read it once more, please. Léelo una vez más, por favor.
I've been there once. He estado una vez ahí.
Must I leave at once? ¿Debo irme de una vez?
I saw him but once. Sólo le vi una vez.
Tom only saw Mary once. Tom solo vio a Mary una vez.
Newscasters blink once every second. Los presentadores de noticias parpadean una vez por segundo.
Must I start at once? ¿Debo comenzar de una vez?
I only saw him once. Sólo le vi una vez.
She visited him once a year. Ella le visitaba una vez al año.
Once lost, time cannot be recalled. Una vez perdido, el tiempo no se puede recuperar.
I have once been to Kyoto. He estado en Kioto una vez.
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