Yet few world-class rivers anywhere have etched a more enduring impression on as many millions for as many years.
然而,世界上很有
样大的河流
给
样多的
样长时间的令
难忘的印象。
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But there's been a long-running debate over whether it's much older. And, yesterday, researchers published a study in the journal " Science, " arguing these majestic formations were formed by two much older rivers cutting through the landscape some 70 million years ago.
但是关于它是否更老的争论由来已久。昨天,研究人员在《科学》杂志上发表了一项研究,认为些雄伟的地层是由大约 7000 万年前两条古老得多的河流穿过
片土地形成的。