Русско-английский научно-технический словарь
впервые
см. тж. первый
• Saturn's rings were first (or originally) discovered by Huyghens.
• We define each term when it is first used.
• D. was the first to establish this fact.
• The first experiment to be carried out with this apparatus took place in Prague.
• By effectively eliminating Doppler broadening this laser technique enables one for the first time to resolve the fine structure of these spectral lines.