1·There are many explanations for why UFOs visit the Earth.
对于不明飞行物为何造访地球有许多解释。
2·Do you believe it all in real life: the aliens, people from outer space, UFOs, government conspiracies, all the things that the TV series deal with?
在现实生活中，你会完全相信电视剧里讲的所有事情吗？比如说外星人、来自外太空的人、不明飞行物以及政府阴谋。
3·Two UFOs playfully chase him and swoop through the air around him.
两个不明飞行物玩耍似的追逐着他，时而在他周围的空气中进行俯冲。
4·The Belgian Air Force scrambling F-16 fighters to intercept UFOs reported by police officers and others.
比利时空军紧急起飞f - 16战斗机拦截不明飞行物，由多名警官和其他人报告。
5·I'm not sure if there are UFOs.
我不能肯定是否有不明飞行物。