托福听力零基础怎么练托福听力打基础听写方法指点( 三 ) _托福

【托福听力零基础怎么练托福听力打基础听写方法指点】1.pick up 捡起;接载
例句:He picked his cap up from the floor and stuck it back on his head.
他从地板上拾起帽子，重新戴在头上。
2.afraid of 害怕
例句:He was afraid of hurting my feelings.
他怕伤了我的心。
3.start to 开始
例句:I'll start to think about it when I have to write my report.
我要写报告时会对此予以考虑的。
4.talk about 谈论
例句:I had a long talk about this with my best friend.
我和我最好的朋友就此事进行了长谈。
2020托福听力练习：黑洞碰撞合并对引力波影响
The news last month that gravitational waves had been discovered made waves throughout the world of science.
The finding, from the Laser Interferometer Gravitational-Wave Observatory, or LIGO, showed that extreme gravity can cause ripples in spacetime.
In the case studied, the extreme gravity came from two colliding black holes.
Now one scientist is suggesting an added wrinkle—that those two black holes might have originated in a single star.
“The situation is similar to a pregnant woman that has twin babies in her belly.”
Avi Loeb of the Harvard-Smithsonian Center for Astrophysics.
He's proposing the idea in a paper that's been accepted for publication in the Astrophysical Journal Letters.
Loeb became suspicious because just 0.4 seconds after LIGO spotted the gravitational waves, a space telescope called Fermi glimpsed a bright flash of gamma-ray light in the same area of the sky.
“Detecting such a signal is quite surprising from a collision of two black holes.
What could be the source of a flash of light following a black hole merger?”
Colliding black holes should not produce such light—but the death of a very massive star could.
“My idea was that if the star is spinning very rapidly to start with, then as its core collapses it produces a bar that breaks into two clumps of matter, sort of like a dumbbell configuration. And these two clumps of matter orbit a common center, and they eventually collapse independently into two black holes.”
Of course, it's possible that the Fermi telescope signal was a false alarm.
So we'll see if future gravitational wave detections are also accompanied by flashes of light—supporting the idea that twin black holes collided upon the collapse of a massive star.
上个月人类首次直接探测到引力波的新闻在科学界激起了波澜。
这一在激光干涉引力波天文台(LIGO)上的重大发现,表明极限重力可以引发时空涟漪。
在这项研究中,这种极限重力来自两个黑洞的碰撞。
美国宇航局费米太空望远镜在引力波信号之后大约0.4秒检测到伽玛射线爆发.jpg
而现在一位科学家提出一种特别的理论，那就是这两个黑洞可能起源于同一颗恒星。

托福听力零基础怎么练 托福听力打基础听写方法指点( 三 )

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