Русско-английский научно-технический словарь
несомненно
см. тж. бесспорно самый лучший
• These impressions in the lunar surface are indubitably craters.
• There is no question (that) the devices could be made much smaller.
• Without question (or Unquestionably, or Doubtless(ly), or Undoubtedly, or Undeniably) the major source of man's intake of mercury is his food.
• This is far and away your best buy.
• To be sure (разг.), the ratio of ... is 100 times greater in the sun than ...