不是所有的不明飞行物都是天外来客。

Not every UFO is extraterrestrial.

天外来客对地球的撞击与白垩纪的物种灭绝事件有着最为密切的联系。

An extraterrestrial impact is most closely linked to the Cretaceous extinction event.

在这里，有世界第一的哈利法塔，有扎根于海的七星帆船酒店，有仿如天外来客的棕榈人工岛。

From here, there are many famous places such as Burj Khalifa tower, Burj al arab hotel, the palm islands.

我祖父生前是一百万富翁，他把自己的全部资财遗赠出来，用以考证埃及金字塔是天外来客建造的这一臆断是否成立。

My millionaire grandfather left all his money to research into proving that the pyramids in Egypt were built by visitors from outer space. That beats the band!

就我个人而言，我要考虑的事够多了，顾不上去为冰期的再现、反基督行为、地球被老鼠、蚂蚁、天外来客占领了这些事儿发愁。

Personally, I had enough on my mind without worrying about another Ice Age, anti-Christ, or Earth being taken over by rats, ants or little green men.