ex·tra·ter·res·tri·al /-təˈrɛstriəl, ˈrɛs(h)ʧəl/
(a.)地球外的
extraterrestrial
adj : originating or located or occurring outside Earth or its
atmosphere; "is there extraterrestrial life?"
n : a form of life assumed to exist outside the Earth or its
atmosphere [syn: extraterrestrial being, alien]