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Coming from, or existing, outside planet Earth - usually describing aliens or life that might exist on other planets. As a noun, 'an extraterrestrial' means an alien being. It's a long, formal or scientific word - in casual talk, people usually just say 'alien' instead.
外星的；（名詞）外星人
組成extra- (outside, beyond) + terrestrial (of the earth, from Latin 'terra', earth) - beyond the earth.
同家族的字
- terrestrialshares the Latin root 'terra', meaning earth
- territoryshares the same root, meaning an area of land
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
extraterrestrialadj/ˌɛk.stɹə.təˈɹɛs.tɹi.əl/
- 1
Originating from outside of the Earth's atmosphere, from space, or from another planet; alien to Earth or its environment.
- Residents of the city of Voronezh insisted today that lanky, three-eyed extraterrestrial creatures had indeed landed in a local park and gone for a stroll and that a seemingly fantastic report about the event carried Monday by the official press agency Tass was absolutely true.
extraterrestrialnoun/ˌɛk.stɹə.təˈɹɛs.tɹi.əl/
- 1
A being originating from outside of the Earth's atmosphere, from space, or from another planet; an alien.
- Smith returns in Men In Black 3 as a veteran agent of a secret organization dedicated to policing the earth’s many extraterrestrials.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。