单词 | Vulcan |
释义 | Vulcan [`vǝl·kǝn] ASTRONOMY A hypothetical planet that was supposed to have an orbit within the orbit of Mercury; its existence was considered about 1859 and in the next few years, but it is generally considered by present-day astronomers to be nonexistent. |
随便看 |
科学参考收录了103327条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。