黑洞的合并使时空产生涟漪(即引力波)，这些引力波最早也要到2015年才可以被科学仪器探测到。
These merger events produce ripples in time and space (gravitational waves) that could be detected by instruments from as early as 2015.
讲的是回声定位仪器最早用于绘制海底地图。很容易找到对应的答案。
Echo sounding devices were early used in making maps of the ocean floor.
这也令我想起了我们受害者所遇到的仪器，最早的受害者就主要集中在沿海和留学生身上。
It also reminds me of the equipment we have encountered victims of the earliest victims are mainly concentrated in coastal areas and on the student body.
这也令我想起了我们受害者所遇到的仪器，最早的受害者就主要集中在沿海和留学生身上。
It also reminds me of the equipment we have encountered victims of the earliest victims are mainly concentrated in coastal areas and on the student body.
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