He answered all my questions with complete assurance.

他十分自信地回答了我所有的问题。

youdao

And so is getting over self-doubt. There is never a complete assurance.

因此不要缺乏自信，从来没有十分确信的事情。

youdao

If even the Newtonian philosophy were not permitted to be questioned, mankind could not feel as complete assurance of its truth as they now do.

即使牛顿(Newton)的哲学，若未经允许加以质难，人类对它的真确性也不会象现在这样感到有完全的保证。

youdao

"This failure to complete the basic quality assurance checks Pearson confirmed that they had completed is deeply disturbing, " city schools Chancellor Dennis Walcott said in a prepared statement.

WSJ: Testing Firm Is Under Fire Due to Errors Scoring School Exams

We did not maintain effective controls to provide reasonable assurance that accounts were complete and accurate and agreed to detailed support, and that account reconciliations were properly performed, reviewed and approved.

FORBES: Connect