We like using lasers to make precise measurements: since the beams don't fan out very much over long distances, they are good light sources to use for interferometry. | El láser se usa mucho para realizar medidas precisas: ya que los haces apenas se ensanchan aunque recorran largas distancias, son fuentes de luz muy buenas para usarlas en interferometría. |
If you don't fan those embers you won't get a flame. | Si no avives esas brasas, no tendrás llamas. |
