Uh yeah…six more spread out over the past 35 years.

——spread是spread 的过去分词型(spread-spread-spread)，这是动词过去分词做后置定语的用法。 还原句子后，可以是there is six more spread out over the past 35 years.

youdao

Uh, yeah, I guess so.

嗯，对，我想是这样。

《牛津词典》

Eventually I mumbled a response: "Uh.".. yeah.

最后我喃喃地回应道：“嗯…是的。”

youdao

Professor Amy Hungerford: Uh huh. Okay. The language, yeah, absolutely.

嗯，语言，当然。

耶鲁公开课 - 1945年后的美国小说课程节选

Charlie 1: Yeah, the wall to the, uh, around the bus are poured concrete.

CNN: Tear gas canister 'bounced off' Waco bunker