As for the pollen, Sugden says it has never been accurately dated and may come from a much earlier clement period.
至于花粉，萨格登说从未有人精确地测定过它的年代，也许它是源于更早的温和时期。
Sugden, a geologist at the University of Edinburgh, was trying to date an ancient volcanic eruption in East Antarctica when he and his colleague uncovered the old ice.
爱丁堡大学地质学家苏格丹，与他的同事们在南极东部揭开古冰层时，就试图去测定南极东部某次古代火山喷发的年代。
Sugden, a geologist at the University of Edinburgh, was trying to date an ancient volcanic eruption in East Antarctica when he and his colleague uncovered the old ice.
爱丁堡大学地质学家苏格丹，与他的同事们在南极东部揭开古冰层时，就试图去测定南极东部某次古代火山喷发的年代。
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