undeniably 

英汉解释

adv. 不可否认地；确凿无疑地

参考例句

1. Education is undeniably the key.
不可否认，教育是关键。
2. He was undeniably in pursuit of the Countess Olenska.
他无疑是在追求奥兰斯卡伯爵夫人。
3. Although electrodes are undeniably convenient for plugging bulbs directly into the lighting system, they are also the main reason why lamps fail.
不可否认，正是由于电极，电灯才便捷地运用到照明系统中，但同时它也正是灯泡坏掉的主要原因。

英英解释

adv.
  1. to an undeniable degree or in an undeniable manner

网络释义

undeniably
无可置疑地; 不容置疑; 不可否认地;