extraterrestrial

extraterrestrial的音标为[ˌekstrəˈteərɪst(ə)l]，基本翻译为“外星人；地球以外之生命体”，速记技巧为“extra-特别地；terrestrial地球的”。

Extraterrestrial这个词源自拉丁语“extra”和“terra”，意思是“地球之外的”。它的变化形式包括复数形式“extraterrestrials”，过去式和过去分词形式“extraterrestrialized”以及现在分词形式“extraterrestrializing”。

相关单词：

1. Alien：这个词源自拉丁语“alienus”，意思是“不属于本地的，外来的”。这个词常用来指外星人，表示与地球人类不同的生物。

2. Outerspace：这个词源自“outer”和“space”，意思是“太空”。这个词常用来表示宇宙空间，与地球表面或地球大气层以外的空间。

3. Interstellar：这个词源自拉丁语“inter”和“stella”，意思是“在星星之间”。这个词常用来表示在星系之间的空间，也就是星际空间。

4. Exobiology：这个词源自“exo”和“biology”，意思是“外星生物学”。这是一个学科，研究外星生命的存在、特征和可能的生存环境。

5. Extradimension：这个词源自“extra”和“dimension”，意思是“超越维度”。这个词常用来指存在于超越我们通常理解的维度中的物质或现象。

以上这些单词都与extraterrestrial相关，描述了与地球人类不同的生命形式和宇宙中的神秘现象。这些单词的出现和发展，也反映了人类对于未知领域的探索和好奇。

短语：

1. extraterrestrial life

2. extraterrestrial intelligence

3. extraterrestrial exploration

4. extraterrestrial environment

5. extraterrestrial matter

6. extraterrestrial civilization

7. extraterrestrial intelligence hypothesis

例句：

1. We hope to find extraterrestrial life somewhere in the universe.

2. The discovery of extraterrestrial intelligence could change our understanding of the universe.

3. Extraterrestrial exploration is a challenging task for future generations.

4. The environment on extraterrestrial planets may be very different from our own.

5. We need to be careful not to contaminate extraterrestrial environments with our waste products.

6. There may be extraterrestrial civilizations out there that we have yet to discover.

7. The idea of extraterrestrial intelligence is a fascinating topic for science fiction writers.

英文小作文：

If we discover extraterrestrial life, it would be a profound moment for humanity. We would have to consider the implications of such a discovery for our understanding of ourselves and the universe around us. It could lead us to question our place in the cosmos and inspire us to explore further into the unknown depths of space. However, it would also raise many ethical and scientific challenges, such as the possibility of encountering hostile environments or other lifeforms that could pose a threat to our own species. Therefore, we need to be prepared and have a clear plan of action in place to ensure that any discoveries are handled safely and responsibly. Ultimately, the discovery of extraterrestrial life would be a testament to the resilience and creativity of the human spirit, and would undoubtedly inspire us to push forward and expand our understanding of the universe in new and exciting ways.