化石

14 A Rare Fossil Record

14 A Rare Fossil Record The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be fossilized. Ichthyosaurs had a

发表于:2018-12-07 / 阅读(197) / 评论(0)

英语范文背诵20篇

托福听力短文 I-16-1

(man) Today I want to discuss fossil fuels such as coat, oil, and natural gas. The term fossil fuel refers to the trapped remains of plants and animals in sedimentary rock. You see, living plants trap energy from the sun by the process of photosynth

发表于:2018-12-30 / 阅读(35) / 评论(0)

托福听力短文

SSS 2009-02-04

This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? Indiana Jones (I hate snakesI hate em!) would have totally despised a snake that lived some 60 million years ago. Because researchers working in Colombia have found th

发表于:2019-01-07 / 阅读(57) / 评论(0)

Scientific American(二)月

2007年VOA标准英语-Fossil Lucy Leaves on Controversial US Tour

By Caroline Sawyer Nairobi 08 August 2007 One of the world's oldest hominid fossils, which revolutionized theories of early man, has left Ethiopia to begin a controversial tour of the United States. Anthropologists want the remains of the fossil, kno

发表于:2019-01-30 / 阅读(75) / 评论(0)

2007年VOA标准英语（八月）

Dinosaurs and Birds

50 恐龙和鸟：谁是谁的祖先？ DATE=5-23-01 TITLE=SCIENCE REPORT - Dinosaurs and Birds BYLINE=Mario Ritter (Start at 59

发表于:2019-01-30 / 阅读(66) / 评论(0)

科技之光

环球英语 — 295：Discoveries of Ancient Remains

Voice 1 Hello. Im Ruby Jones. Voice 2 And Im Marina Santee. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 The large creature

发表于:2019-03-04 / 阅读(93) / 评论(0)

环球英语 Spotlight

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