He refers to this bias as a major tactical error.

他将这种偏颇称为“重大的战术错误”。

He's made some major strategic errors in deploying his troops.

他在部署军队时犯了一些重大的战略错误。

However, there were also some " major, " or important or big, " errors" (errors).

但是，也有一些“主要的”或重要的或大的“错误”（errors）。

Our dialogues don't have any inaccuracies or major errors because they're written by the wonderful Dr. Lucy Tse.

我们的对话没有任何不准确或重大错误，因为它们是由出色的 Lucy Tse 博士编写的。