no doubt

基本解释

And there must be no doubt: As America’s first Pacific President, I promise you that this Pacific nation will strengthen and sustain our leadership in this vitally important part of the world.
毫无疑问，作为美国的首位心系太平洋的总统，我向你们承诺，这个太平洋国家将增强并持续保持我们在世界这一极其重要地区的主导地位。
Of this I have no doubt before meeting him.
在见到他之前我就对此毫不怀疑。
No doubt about that.
那是毫无疑问的。

"And as Iran's leaders continue to ignore their obligations, there should be no doubt: they,too, will face growing consequences.
Now,that thing that wakes up after this complete irreversible amnesia will no doubt eventually develop a personality,a set of beliefs,memories.
这人在经历了完全不可逆的失忆后醒来,最终发展出了自己的人格，信念和记忆。
耶鲁公开课 - 死亡课程节选
And after the usual amount of scholarly debate, there seems to be no doubt that it was the City of Troy.
经过一番学术讨论之后,这里被确定为特洛伊城
耶鲁公开课 - 古希腊历史简介课程节选

And he said there's no doubt for him the Clinton campaign was throwing the race card.
NPR: Injecting Race into Politics