They underwent courses in radio communication,demolition,and sabotage.
他们接受了无、破坏的课程。
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When these monsters hit us, nothing happens on Earth; while even smaller storms could damage satellites, affect radio communication, or be dangerous to astronauts, for people on the surface, space weather is harmless.
当这些怪物击中我们的时候,地球上什么也没生;即使是更小的小风暴也以损坏卫星,影响无线电通信,或对宇航员造成危害,对于地球表面的人来说,天气是无害的。
And, although there are government and professional groups that have radio communication like this, there are also a group of people we call " amateurs, " people who are not professionals in the radio business, but like to communicate.
而且,虽然有政府和专业团体有这样的无线电通信,但也有一群我们称之为“业余爱好者” 的人,他们不是无线电行业的专业人士, 但喜欢交流。