This is unquestionably true.

这毫无疑问是对的。

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For several reasons, these Numbers do not give a true picture of mortality during the pandemic, which is unquestionably higher than indicated by laboratory-confirmed cases.

出于若干原因，这些数字不能反映流感大流行期间死亡率的真实情况，而毫无疑问的是实际死亡率要高于实验室确认病例显示的情况。

youdao

For several reasons, these Numbers do not give a true picture of mortality during the pandemic, which is unquestionably higher than indicated by laboratory-confirmed cases.

出于若干原因，这些数字不能反映流感大流行期间死亡率的真实情况，而毫无疑问的是实际死亡率要高于实验室确认病例显示的情况。

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