astronautics

astronautics的音标为[ˌæstrəˈnɔːtɪks]，基本翻译为“宇航学”，速记技巧为：航天=太空+航行。

Astronautics这个词的词源可以追溯到希腊语中的“宇宙航行”这个词，它是由“astron”和“nautike”两个词组合而成的。这个词在英语中主要用来指代航天科学和技术，以及相关的航天活动。

Astronautics这个词的变化形式主要有复数形式（astronautics或astronautica）、过去式（astronauticated或astronauted）、过去分词（astronautic或astronauted）以及现在分词（astronauting）等。

相关单词方面，与astronautics这个词相关的单词有很多，例如spacecraft（航天器）、satellite（卫星）、rocket（火箭）、lunar module（登月舱）、interplanetary（行星际的）、interstellar（星际的）、orbit（轨道）、escape velocity（逃逸速度）等。这些单词都与航天科学和技术密切相关，用于描述航天器的种类、运行状态、速度等。

总的来说，astronautics这个词在英语中是一个重要的词汇，它代表着航天科学和技术的发展，也反映了人类对于太空探索的热情和追求。

常用短语：

1. space exploration

2. space station

3. rocket science

4. satellite launch

5. orbital mechanics

6. interplanetary travel

7. space debris

双语例句：

1. Space exploration is a challenging and exciting field of study.

2. The space station is a marvel of modern technology.

3. Rocket science is complex and requires a deep understanding of physics.

4. Satellite launches are a crucial part of modern communication systems.

5. Understanding orbital mechanics is essential for space exploration.

6. Interplanetary travel is a distant goal that requires advanced technology.

7. Space debris is a growing problem that needs to be addressed.

英文小作文：

Astronautics is an exciting and challenging field that deals with the exploration and use of space. From satellites to space stations, astronautics has opened up a new world for us to explore and understand. It involves the science of rocket science, orbital mechanics, and interplanetary travel, all of which are essential for the advancement of space exploration. From monitoring our planet to sending messages to extraterrestrial life, astronautics has opened up a whole new universe for us to explore and learn from. I hope to one day be able to contribute to this field and help expand our knowledge of the universe.