| 单词 | nasmyth focus |
| 释义 | > as lemmasNasmyth focus Nasmyth focus n. an external focal point to one side of the tube of a reflecting telescope at its lower end.extracted from Nasmythn.< as lemmas |
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英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。