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。
Although some sightings of UFOs are difficult to explain, most can be explained quite easily.
虽然有些目击 UFO的现象很难解释，但大多数都可以很容易地解释。
I'm not sure if there are UFOs.
我不能肯定是否有不明飞行物。
I'm quite sure there are UFOs.
我深信有不明飞行物存在。
听看学汤姆：你相信有不明飞行物吗？
汤姆：你相信有不明飞行物吗？
Topic 2 Are you sure there are UFOs?
话题2你确定有不明飞行物吗？
I think it will not come from UFOs.
我认为它不是来自幽浮。
你相信有不明飞行物吗？
他们相信幽浮的存在。
UFOs: What Scientists Say May Shock You!
不明飞行物之：让你震惊的科学言论！
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。
He met us after a dinner because he wanted to talk about UFOs.
他在晚宴后接见我们，因为他想和我们聊一聊不明飞行物的事情。
Are you stupid? They are called UFOs, so not everybody can see them.
你笨吧你，他们叫做不明飞行物，所以不是每个人都能看到的啊。
These UFOs often come to collect loyal supporters from here on Earth.
这些不明飞行物时常来收集来自在地球上忠诚的支持者。
What's more, people may take kites or balloons as UFOs in poor light.
更有甚者，在昏暗的照明条件下，人们甚至会将风筝和气球误认为ufo。
In 1952, the US Air Force began Project Blue Book, a study program on UFOs.
1952年，美国空军开始着手实施“蓝皮书计划”，这是一项针对不明飞行物的研究项目。
There's nothing odd about that; many people believe in UFOs and aliens.
没有什么稀奇，许多人相信UFO(飞碟)和外星人。
Never before had NASA participated in such a large public debate on UFOs.
NASA以前从未在公众场合上参加这样的一场大的公开辩论。
In 1952, the US Air Force began Project Blue Book, a study program on UFOs.
1952年，美国空军开始着手实施施“蓝皮书计划”，这是一项针对不明飞行物的研究项目。
Daniel: are you stupid? They are called UFOs, so not everybody can see them.
丹尼尔：你笨吧你，他们叫做不明飞行物，所以不是每个人都能看到的啊。
It is recommended that readers watch this video to fully view the giant UFOs.
建议读者观赏此影片以完全显示出巨大的不明飞行物。
Then there was the questioner who asked: "Where can I get software to track UFOs?""
还有人会问：“在哪能下载追踪UFO的软件？”
There is simply no actual evidence at all linking UFOs with an extraterrestrial source.
根本没有任何证据能将众多ufo和来自于地球外联系在一起。
There is simply no actual evidence at all linking UFOs with an extraterrestrial source.
根本没有任何证据能将众多ufo和来自于地球外联系在一起。
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