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1.gravitational wave 引力波
例句:What will happen when a gravitational wave was found by my computer?
如果一个引力波被我的电脑找到了（计算出来了），会怎么样？
2.come from 来自
例句:I come from the north.
我是北方人。
3.black hole 黑洞
例句:Radio signals received from the galaxy's centre back up the black hole theory.
从该星系中心收到的无线电信号证实了黑洞理论。
4.start with 开始
例句:To work out a plan, one has to start with investigation.
制定计划要从调查研究入手。
