1.convert to 转换成

例句：Save money by converting your car to unleaded.
将车改装一下，使用无铅汽油，这样可以省钱dYFrAL;ZXcJ!;。

2.take place 发生

例句：When does the wedding take place?
什么时候举行婚礼?

3.gravitational wave 引力波

例句：The size of the vibrations depends on the strength of the gravitational wave.
振动的幅度依赖于引力波的强度

4.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nP=+KH5Ky;[45。