The samples contained layers of ancient sediment built up over millions of years.
这些样本包含数百万年积累起来的古代沉积物层。
单词 | ancient sediments |
例句 |
原声例句
VOA Special 2019年1月合集 The samples contained layers of ancient sediment built up over millions of years. 这些样本包含数百万年积累起来的古代沉积物层。 Journeys Through Geologic Time Our best clues can be found in ancient sediments. 我们最好的线索可以在古代沉积物中找到。 纽约时报 (New York Times) Based on that discovery, the researchers are developing new methods that they hope will let them pull even more DNA out of ancient sediments. 基于这一发现,研究人员正在开发新的方法,他们希望能从古代沉积物中提取更多的DNA。 |
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