“free of charge”概念、定义、翻译-科学时代

单词	free of charge
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随便看	structural analysis programme system structural anisotropy structural anthropology structural anthropology structural approach limit of tunnel structural archaeology structural archaeology structural assimilation structural basin structural basin structural breakdown structural budget structural budget balance structural capital structural carpentry structural causality structural ceramic structural ceramics structural change structural change structural change structural change structural change structural change--structural change（SC） structural change（SC）

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。