| 单词 | portal frame |
| 释义 | Word Frequency portal framenoun civil engineering, building a frame, usually of steel, consisting of two uprights and a cross beam at the top: the simplest structural unit in a framed building or a doorway |
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英语词典包含233703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。