Manufacturing's shrinking presence undoubtedly helps explain the decline in craftsmanship, if only because many of the nation's assembly line workers were skilled in craft work, if not on the job then in their spare time.
出自-2013年6月閱讀原文
Undoubtedly American education should train more scientists and engineers.
出自-2010年12月閱讀原文
California has spent years preparing for "The Big One"—the inevitable earthquake that will undoubtedly unleash all kinds of havoc along the famous San Andreas fault (斷層).
2019年12月六級真題（第一套）閱讀 Section C
柯林斯高階英漢雙解學(xué)習(xí)詞典釋義
ADJ
無疑的；確實的；顯然的
You can use undoubted to emphasize that something exists or is true.