“反面回声”的概念、定义、翻译、参考文献-科学参考

单词	反面回声
释义	反面回声 bottom echo
随便看	itemize bill itemized account itemized appropriation itemized deduction itemized list itemized record itemized schedule item line item master record item number item of balance item of business item of expenditure item of information item of information in a table entry item-on-term file item record item repairing order items item separation symbol items for export as part of foreign aid item size items master file items of receipt items of repair job

科学参考收录了1248194条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。