second time around echo 第二次返射回波 ; 二次回波
second-time-around echo [电子] 第二次反射回波 ; 周期外反射
ond-time-around echo 第二次反射回波
multiple time around echo 多倍程回波
multiple time-around echo pulse 多周期回波
ghost echo phantom echo wrap-around 幻影回波
While the laughters echo around 谈笑却永远清晰响亮
Men we are the Adam and Eve of a virgin earth.Now , good - bye ; for voices are babbling around me and I should not wonder if you were to hear the echo of them while you read this letter.
现在,再见了;因为我的周围一片嘈杂。 不知你在读此信时,是否有这些声音的回声萦绕耳际。
But on Fridays Homs feels like a city under siege. Yellow plastic signs, rocks and dustbins are set up as roadblocks. Gunshots echo around the streets of restless neighbourhoods.
但是一到周五,整个城市就像遭到围攻一样,黄色塑料标志、石头和垃圾桶被堆成路障,枪声回响在发生骚乱的街区。
Since x-rays travel at the speed of light, the echo indicates that an object fell into the black hole around 350 years ago.
因为X射线以光速运行,因此反射表明,大约在350光年前,有一个物质落入黑洞。
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