“交换”概念、定义、翻译-科学时代

单词	交换
释义	请查阅互换--交换--立交--立（体）交（叉）
随便看	direct object direct observation direct observation direct observation direct occurrence of description direct octaves direct operating expenses direct optical viewfinder director director director director director director director director director director director director director director and officer liability insurance director and officer liability insurance (D&O liability insurance) directorate direct orbit

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。