单词：trace fossils
[网络] 生痕化石；遗迹化石；足迹化石
单词：trace fossils 相关文章
MARY LOUISE KELLY, HOST: The phrase leave no trace is often used to describe good behavior in national parks, meaning enjoy the scenery, and then leave the park exactly as pristine as you found it. The new movie Leave No Trace is about a father and d
发表于:2018-12-18 / 阅读(53) / 评论(0)
2018年NPR美国国家公共电台7月
2018年NPR美国国家公共电台7月
STEVE INSKEEP, HOST: We have news this morning about the origin of life. The news is about just how hard it is to find that news. NPR's Rae Ellen Bichell reports. RAE ELLEN BICHELL, BYLINE: Things get hairy when you go looking for the earliest forms
发表于:2019-01-16 / 阅读(50) / 评论(0)
2017年NPR美国国家公共电台3月
2017年NPR美国国家公共电台3月
By Peter Heinlein New York City 05 October 2007 Runners on the streets of New York are commonplace this time of year. There is the marathon next month, and occasionally, other organized runs. But one annual event has skyrocketed to prominence in rece
发表于:2019-02-03 / 阅读(101) / 评论(0)
2007年VOA常速英语（十月）
2007年VOA常速英语（十月）