她的努力工作无疑促成了她的成功。

Her hard work has undoubtedly contributed to her success.

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Her hard work has undoubtedly contributed to her success.

undoubtedly 由前缀 un-(表示"不")和 doubt("怀疑")以及副词后缀 -edly 组成,字面意思是"不可怀疑地",即"毫无疑问地、确实地"。

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