I will make bold to speak again.

我这次又要再大胆地和您说一遍了。

May I make bold to suggest that you were wrong to do so?

我斗胆说一句，这件事您做错了。

The bidder can't make bold to withdraw the bid or to modify it in the period of validity of the bid.

投标人在标函有效期内不得擅自撤回投标或修改标函。

That would be the bold claim to make at this point.

在这一点上，这将是一个大胆的主张。

"Peradventure you will even make so bold as to say he lied," scoffed Hugo.

“也许你还敢说他撒谎。”雨果嘲弄地说。