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月阅读原文
Undoubtedly American education should train more scientists and engineers.
出自-2010年12月阅读原文
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 (断层).
2019年12月六级真题（第一套）阅读 Section C
柯林斯高阶英汉双解学习词典释义
ADJ
无疑的；确实的；显然的
You can use undoubted to emphasize that something exists or is true.