| 单词 | tool subject |
| 释义 | tool subject Educ. a subject that, when mastered, equips students with a skill useful in studying other subjects: Grammar is a tool subject for English composition. [1920-25] |
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英语词典包含168451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。