But according to an old rule of formal grammar, I made a mistake here.

但是根据正式语法的旧式规则，我在这里犯了一个错误。

It emphasizes natural communication rather than formal grammar study.

它强调自然的交流而不是形式的语法学习。

Moreover, a dissertation must satisfy the strict rules of formal grammar.

此外，论文必须满足严格的形式语法规则。

English didn't have any history of style--it didn't even have a formal grammar or a dictionary.

英语没有任何风格的历史——它甚至没有正式的语法或字典。

People use them often interchangeably in a sentence, and it is really a matter of more formal grammar when it comes to trying to distinguish between the two.

人们经常在一个句子中互换使用它们，而在试图区分两者时， 这实际上是一个更正式的语法问题。

It would be more correct grammatically, or at least more acceptable according to formal grammar rules, to use a preposition after " talk" – " Let's talk about tech." " Let's talk about love."

在“talk”之后使用介词——“Let's talk about tech” “Let's talk about love” 在语法上更正确， 或者至少根据正式语法规则更容易被接受。