搜索关注在线英语听力室公众号:tingroom,领取免费英语资料大礼包。
(单词翻译)
This is Scientific American's 60-Second Science. I am Adam Hamterture, got a minute?
What's sixteen feet tall and 9,550 years old? It’s the world's oldest tree. The worn and weathered spruce grows in Sweden's windswept tundra1. But, until recently, well, recent to the tree at least, it barely resembled a tree at all. Before this last warm century, the spruce grew more like a shrub2 to survive the harsh conditions of its cold landscape. But rising temperatures convinced the tree to give up its shabby lifestyle, shed the majority of its needles and go with the single-trunk look.Researchers from Sweden's Umea University found the tree growing amid the remains3 of four generations of spruce dating from 375 to well over 9,000 years old. Spruce trees can clone themselves by sending new trees up through the ground from established roots. When the scientists tested the current tree, they found it was genetically4 identical with the remains of all four previous generations. Researchers are excited about having a 10,000-year-long case study of how past climate changes affected5 plant growth and productivity. It’s a finding sure to spruce up all of botany.
Thanks for the minute for Scientific American's 60-Second Science. I am Adam Hamterture.
1 tundra | |
n.苔原,冻土地带 | |
参考例句: |
|
|
2 shrub | |
n.灌木,灌木丛 | |
参考例句: |
|
|
3 remains | |
n.剩余物,残留物;遗体,遗迹 | |
参考例句: |
|
|
4 genetically | |
adv.遗传上 | |
参考例句: |
|
|
5 affected | |
adj.不自然的,假装的 | |
参考例句: |
|
|
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎 点击提交 分享给大家。