No commas in between different types of adjectives

[Tung Quoc]

Hi teacher Yankee,

You wrote:

No commas in between different types of adjectives in a series. (1)

Could you tell me the difference in (1) and (2)?

No commas between different types of adjectives in a series (2)

Q

[Yankee]

.
The word in is optional. It doesn't change the meaning here.
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