**a Decade Of Glam:** See How Dolly Parton's Hair Has Stayed Iconic The Evolution Parton A Journey Through Glamour
Decade的概念： 從曆法的單位上來看，“decade”是曆法在十年的一個單位，同樣的還有lustrum （5 年），century （100年），millennium（1000年）. In the past decade的同義字'in the past decade' means that it happened at some point within the last ten years. I guess the only minute difference would be how we use them.
Dolly Parton’s Iconic Hair Through the Years
In a decade = in 10 years time this has no specific date. 'over the past decade' means that it happened repeatedly, more than once, or. In the/this decade = in these 10 years this implies you're talking about the current decade.
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I mean we can say two decades or three decades to.
