“Preclassic Period”概念、定义、翻译-科学时代

单词	Preclassic Period
释义	民族学词汇手册 Preclassic Period 先古典期（中美洲文化期）
随便看	waterproofing powder waterproof instrument waterproof insulation waterproof layer waterproof layer water-proof leather waterproof machine waterproof mortar waterproof motor waterproofness waterproof packing waterproof paper packing waterproof paper (WP paper) waterproof sealed camera waterproof structure waterproof wrapping water properties water pump water pump water pumpage water pump house water purification water purification water purification plant water purification structure

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。