rock of engine的意思|示意

If you want to research a topic such as the "story of rock" with geophysics and rock formation in mind, you don't want a search engine to give you millions of pages on rock music.

如果你想一个类似关于地理和岩石形成的“岩石故事(tory of rock)”的主题，你肯定不想让搜索引擎给出上百万页关于摇滚音乐的结果。

The space flight test and application situation of electric rocket engine were introduced. Development and expectation of electric rock…

介绍了电火箭的航天飞行试验和应用情况。