VOA慢速英语(翻译+字幕+讲解):科学家成功改造水母
日期:2020-02-20 17:56

(单词翻译:单击)

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听力文本

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Scientists Make Jellyfish Faster
Researchers have used very small electronic devices to make jellyfish stronger and faster.
The scientists say they developed these electronic jellyfish in the hopes of sending them to study and explore the world's oceans.
A report on the experiment was published in the journal Science Advances.
The study
Jellyfish are unusual creatures. They move through seawater by contracting, or reducing the size of, their muscles.
For the experiment, the researchers put an electronic device, about 2 centimeters in length, inside a moon jellyfish, a common kind of jellyfish.
The researchers said the device caused the creatures to move their bodies more often. They swam around three times faster than usual. These jellyfish use "10 to 1000 times less external power per mass than other aquatic robots reported in literature," noted Nicole Xu and John Dabiri, the two lead authors of the report.
Jellyfish are known to release mucus at times when they are tense or feeling stressed. No such reaction was noted during the study. The jellyfish swam normally after the electronic device was removed, the researchers said.
"Care is taken not to harm the jellyfish," Dabiri explained.
The future
The next step will be to test ways to control where the jellyfish go. Another possible step: to develop small sensors that could take long-term measurements of ocean conditions, added Xu and Dabiri.
"It's very sci-fi futuristic," said Xu, a bioengineer at Stanford University in California. "We could send these bionic jellyfish to different areas of the ocean to monitor signs of climate change or observe natural phenomena."
One of the first goals will be deep dives, added Dabiri, who studies mechanical engineering and serves as a professor at the California Institute of Technology. Deep dives are important because of a major gap in human understanding of the deep oceans.
"Basically, we'd release the bionic jellyfish at the surface, have it swim down to increasing depths, and see just how far we can get it to go down into the ocean and still make it back to the surface with data," he said.
"Jellyfish have existed for over 500 million years, and over that time, their body structure has remained largely unchanged, said Xu. "So it's interesting to figure out what makes them so special and how we can learn from them."
She added, "Because we use animals with natural swimming motions, the hope is that they won't disturb the environment in the same way that a submarine might, so we can expand the types of environments we can monitor."
I'm John Russell.

重点解析

1.electronic device 电子装置

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An electronic device amplified the speaker's voice.
电子设备放大了演讲人的声音Vs,ixKkw8W0o,[

2.go down 下降

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I went down on my knees and prayed for guidance.
我跪了下来,祈求得到指引TLBVrX-#(7quX5jfZM

3.climate change 气候变化

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Carbon emissions exacerbate the global climate change problem.
碳排放加剧了全球气候变化问题,1Yiw^=Fa+w

4.deep dives 深潜

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The balloonist liked to deep dive as a hobby.
该名气球驾驶员喜欢把深海潜泳当做嗜好N,toq8i0=pAq4FKilcw

5."So it's interesting to figure out what makes them so special and how we can learn from them."

it's interesting to 做某事有趣

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It's interesting to watch a good salesman in action.
看一个出色的推销员卖东西是很有趣的daCJ|x67qB,+
It's interesting to see how he's combining with Welbeck at the moment-they've done very well together.
看到现在他和维尔贝克的配合很有意思,他们一起很合得来si~zA[v~rV#&m2

6."So it's interesting to figure out what makes them so special and how we can learn from them."

figure out 弄明白

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They're trying to figure out the politics of this whole situation
他们正试图弄明白整个情形背后的权术争斗yxqLI@bEggL
I simply couldn't figure out his intention.
我简直揣摩不透他的用意SKA0_T[s0~Y)9AT

参考译文

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科学家成功改造水母
研究人员利用很小的电子设备就让水母变得更快更强WU2b9sXRb(bs6X)Ynp(f
科学家们声称,他们研发出这种电子水母是希望将它们送去研究和探索海洋世界YI9Fm,NWRHzsJKB_n95c
关于该实验的报告发表在《科学进展》杂志上wi;l;kL^AKJ,
科研
水母可不是一般的生物5lRS,pfxRZ;9SlhWy。它们通过自我收缩或减小自己的肌肉尺寸在海水中移动0QyuOT=z0G,8f4t
研究人员在实验中将一种长度约2厘米的电子设备放在一种常见的水母——海月水母里面Vrc]Y#RW_p,a3wLb41G

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科学家成功改造水母.jpg
研究人员称,这种装置使它们更频繁地移动身体,且它们的游泳速度也比平常快三倍TC8@,7[eaj2^KdXp;。报告的两位主要作者妮可·徐和约翰·达比利指出,与其他文献中报道的水生机器人相比,这些水母每质量所消耗的外部功率少10到1000倍”3[V11XxM)BMv0l
已知水母在紧张或感受到压力时会释放粘液g5*n-2xe3jYg|5es754。然而在研究过程中并未发现水母有此类反应6!FRQ|j36F]。研究人员称,在移除电子设备后,水母的游动会恢复常态JYJDZ|R@gw,dB
“为避免伤害到水母,我们采取了措施,”达比利解释道FIhJPmqa+;8
未来
研究的下一步是测试控制水母去向的方法1dS]zhP.Vv|。徐和达比利补充道,可能进行的一个步骤是:开发能够对海洋状况进行长期测量的小型传感器dc~cphp^ZGuv#
“这看起来非常科幻,”加州斯坦福大学的生物工程师徐工程师表示GXSN[S~JKf!ffCLb&。“我们可以将这些仿生水母送到海洋的不同区域,以监测气候变化或观测自然现象oN]O^gzLX#|HECkd6a。”
达比利补充说,其中一个首要目标是深潜&Uv3BLh-ct~]Ru@lf,V。他的研究领域是机械工程专业,时任加州理工学院教授WFWj1fDdlO,8ou0Z|r。深度潜水之所以重要,是因为人类对深海的了解还存在很大缺口9UA.s%@N1~p~D%DW^
他说:“通常我们将仿生水母放到水面,然后让它渐渐游到较深的水下,测试我们能把它放到多深的海里,同时仍然能带回所需的数据”g,-^;3asb)oDJwd1w
“水母已经存在了超过5亿年,且一直以来它们的身体结构基本保持不变,”徐工程师说道^e0^=yMzj6b5Ys3。“因此,弄清楚是什么使它们如此特别以及我们能从它们那学到什么是很有趣的d1Vos*eQqY4DYA.KO。”
她还补充道:“因为我们利用的是自然游动的动物,所以它不会像潜水艇那样干扰自然环境,这样我们就能扩展能够监测到的环境的类型wKH..!5b^#E。”
约翰·罗塞尔为您报道DS)e|h3a(s(]&Nr&e|=

译文为可可英语翻译,未经授权请勿转载!

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